This is the dinner I make when I want something that feels a bit special without being any real trouble. Zesty lemon-marinated chicken with a tray of roasted Mediterranean vegetables, finished with a cool, herby yoghurt sauce, delivers a magnificent 42g of protein for around 450 calories. It is fresh, vibrant and genuinely feast-like, yet it is squarely on-plan for a GLP-1.
A quick word first: I am not a doctor or a dietitian, just someone who lived this. None of these foods or supplements are medication, and if you are on a GLP-1, check anything new with your GP or pharmacist. Right, let us get to it.
For more evening ideas, see my high-protein dinner ideas, and for the full approach, my complete GLP-1 guide.
Why this dinner feels special but stays on-plan
Eating well long-term needs meals that feel generous, not punishing, and this delivers exactly that.
42g of protein, the highest in the series. The generous chicken portion makes this a serious muscle-protecting dinner, which is the priority on a GLP-1.
The lemon marinade does the flavour work. A simple lemon, garlic and herb marinade makes plain chicken taste vibrant and special for barely any effort or calories.
Herby yoghurt adds a cooling, protein-rich finish. A quick yoghurt sauce lifts the whole plate and sneaks in even more protein, all while feeling like a restaurant touch.
Why marinating is the cheapest upgrade in cooking
If you want to make cheap, lean protein taste incredible for almost nothing, learn to marinate. It is one of the most underused techniques in home cooking, and it transformed how I eat on this journey. A plain chicken breast is a bit boring; the same breast marinated in lemon, garlic, olive oil and herbs for even half an hour becomes something you actually look forward to. The acid in the lemon tenderises the meat while the aromatics flavour it all the way through, so you get juicy, deeply flavoured chicken with no added calories to speak of.
This matters enormously for sticking to a high-protein diet. Lean protein is the foundation of eating well on a GLP-1, but if it is bland, you will get bored and drift off it. Marinades are how you keep it exciting. A few minutes of prep and a bit of time in the fridge is all it takes, and you can vary the marinade endlessly — lemon and herb one night, spiced and smoky the next. Get into the habit of marinating your protein and you will never find a high-protein diet boring again. It is the cheapest, easiest upgrade you can make to your cooking.
The macros that matter
Here is roughly what one serving gives you. Treat these as a guide rather than gospel, since it depends on your exact ingredients and portions:
| Approx per serving | Amount |
|---|---|
| Calories | ~450 kcal |
| Protein | 42g |
| Carbohydrate | 22g |
| Fat | 20g |
| Fibre | 7g |
The protein figure is the one I watch on a GLP-1. As a rough guide I aim for somewhere around 1.2 to 1.6g of protein per kilo of body weight across the day to protect muscle while losing fat, and I judge every meal by how much of that it contributes. I log meals like this in Cronometer (it is free) so I know I am actually hitting my targets rather than hoping. The first time I tracked properly I realised I was eating far less protein than I thought, so if you have never done it, give it two weeks.
What you need (serves 1)
- 2 large chicken breasts (about 320g)
- Juice and zest of 1 lemon
- 2 cloves garlic, crushed
- 1 tbsp olive oil
- 1 tsp dried oregano
- 1 aubergine, chunked
- 1 red pepper, sliced
- 1 red onion, in wedges
- A handful of cherry tomatoes
- For the herby yoghurt: 150g Greek yoghurt, a handful of chopped mint and parsley, squeeze of lemon, salt
How to make it
- Mix the lemon juice and zest, garlic, olive oil and oregano, and marinate the chicken in it for at least 30 minutes (longer is better).
- Heat the oven to 200C (fan 180C). Spread the aubergine, pepper, onion and tomatoes on a roasting tray.
- Add the marinated chicken to the tray, pouring over any extra marinade.
- Roast for 25–30 minutes until the chicken is cooked through and the vegetables are tender and charred at the edges.
- Meanwhile, stir together the Greek yoghurt, chopped herbs, a squeeze of lemon and a pinch of salt for the sauce.
- Serve the chicken and roasted veg with a generous spoonful of the herby yoghurt.
- Scatter with any extra fresh herbs and serve.
Tuning it to your day
This is already very high-protein, and flexible:
Add a carb if you need it. A little couscous, quinoa or some new potatoes rounds it out for a hungrier day or after training.
Add chickpeas to the tray. They roast beautifully and add plant protein and fibre.
Add feta. Crumbled over at the end for a salty, protein-rich lift. See how much protein per day.
Making a herby yoghurt sauce that lifts any meal
A good yoghurt sauce is one of those small things that makes a healthy plate feel finished and restaurant-worthy, and it takes about two minutes. The base is simply thick Greek yoghurt, loosened with a squeeze of lemon and seasoned with salt, then stirred through with whatever fresh herbs you have — mint and parsley here, but coriander, dill or chives all work depending on the dish. You can add crushed garlic for punch or a little grated cucumber to make it more like a tzatziki. This one sauce works across so many meals: alongside roasted or grilled meat and fish, dolloped onto spiced dishes to cool them, spread in wraps, or spooned over roasted vegetables. It adds creaminess, freshness and a hit of protein, all for very few calories. Once you get into the habit of whipping up a quick herby yoghurt, you will find it elevates dinner after dinner — it is the kind of simple flourish that makes eating well feel generous rather than restrictive.
Marinate ahead, roast fresh
The marinating actually makes this a great prep-ahead dinner — get the chicken in its marinade in the morning or even the night before, and it is ready to throw on a tray when you get in. The roasted chicken and veg are also excellent cold, making a superb next-day high-protein lunch. A special-feeling but low-effort part of my meal prep ideas for Mounjaro.
How it fits a full day of eating
At 42g of protein, this is the single highest-protein dinner in the series, and it can single-handedly carry your daily target even after a light day. I still aim for a solid high-protein breakfasts and high-protein lunch, but a dinner this generous means I never end the day short on protein.
It is naturally lower in carbs, so it suits a day where I have had carbs earlier, or I add couscous or potatoes if I need energy. a protein shake is there after training. This is exactly the kind of protein-rich dinner that makes the whole-day target effortless — my complete GLP-1 guide explains how I plan around it.
No appetite today?
Even on a low-appetite evening, this is easy to scale — eat the chicken and a little veg with the cooling yoghurt, and save the rest. Even a small portion banks serious protein. When cooking is beyond you, HelloFresh keeps proper meals coming. More in what to eat with no appetite.
Supplements that pair well
A dinner this high in protein leaves your supplements to focus on the basics. I take a daily Super Supplemental and Triple Magnesium in the evening for muscle and sleep, and the yoghurt adds gut-friendly bacteria that a probiotic like Pre + Pro 15 builds on. The free Lily & Loaf lifestyle analysis matches a routine to you.
Frequently asked questions
How long should I marinate the chicken?
At least 30 minutes makes a real difference, but a few hours or overnight is even better. The lemon and herbs tenderise and flavour the meat all the way through, turning plain chicken into something special.
Is 450 calories right for dinner?
It is a generous, satisfying dinner, and much of it is protein and vegetables that keep you full. Scale the chicken or skip any added carbs if you want it lighter on a given night.
Can I make the herby yoghurt in advance?
Yes — it keeps a couple of days in the fridge and is useful across loads of meals. Make a batch and use it on wraps, salads and other dinners through the week.
What vegetables work best?
Aubergine, peppers, courgette, onion and tomatoes are classic Mediterranean roasting veg. Use whatever you have that roasts well — just cut denser veg smaller so it cooks in time.
Can I cook the chicken on the hob or griddle instead?
Absolutely — the marinated chicken is delicious griddled or pan-fried if you would rather, and you can roast the veg separately. The tray method is just the easiest for washing up.
The bottom line
Mediterranean lemon chicken with roasted veg and herby yoghurt is the dinner that feels like a feast while staying firmly on-plan — a magnificent 42g of protein, a tray of vegetables and a cool, herby sauce for around 450 calories. Learn to marinate and you will never find high-protein eating boring again. Add couscous or potatoes if you need the energy. To match your supplements to a high-protein routine, the free Lily & Loaf lifestyle analysis is a quick, no-pressure check.
The tools I lean on
If you are putting a GLP-1 routine together, this is the order I would do it in, free tools first:
- Track a fortnight of food in Cronometer so you can see your real protein and calories.
- Take the free Lily & Loaf lifestyle analysis to find the supplements actually worth buying.
- Start an Audible trial for something to listen to while you cook or walk.
- Keep HelloFresh on standby for the weeks cooking from scratch just is not happening.
- Batch-cook and freeze portions in a set of freezer-safe containers so there is always a healthy dinner a few minutes away.
A bit about me
I am Alan Spicer. I lost around seven stone on Mounjaro and filmed the whole thing, warts and all, on my YouTube channel. Simple, protein-first dinners like this were a real part of how I held onto muscle and kept the weight off.
This article shares my personal experience and general information only. It is not medical advice. Food and supplements support a balanced diet and healthy lifestyle and do not replace it or any treatment prescribed by your doctor. Speak to your GP or pharmacist before making changes, especially while on a GLP-1 medication. Nutrition figures are approximate and will vary with the exact ingredients and brands you use.
Inspired by the kind of fresh, wholefood dinners in the Lily & Loaf evening meals collection. This is my own version, written from my own kitchen.
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