Glaze aubergine, mushrooms, chicken or salmon with a mix of soy sauce, honey, lime juice, and oil. Bake and serve with rice and greens. You could also just sprinkle on a spice mix like garam masala or five spice with salt and oil
Do a traybake, today we watched nigella put frozen peas, leeks, garlic, salt and oil. She then put raw chicken thighs on top and drizzled with more salt and oil and baked the whole thing for 30 minutes
Chickpea, sweetcorn, onion, lemon juice and tuna salad (a real thing I ate the other day when I only had the energy to open tins)
Nacho salad - tinned kidney beans(we like the ones in a vaguely Mexican sauce) warmed and tossed with chopped lettuce, tomatoes, jalapenos, nachos, and cheeeeese. Sometimes we also add chorizo
Fried rice with anything
Roast veg and cheese omelette, if you roast the veg in an oven dish (the deep kind) then you can give them a headstart before pouring the Eggs in and baking the whole thing
A whole different approach to consider is component cooking - e.g. at the beginning of the week roast a few different types of veg and a whole chicken. Boil some eggs. Keep a stock of various sauces, pickles and pastes. Combine them in ways that feel good to you during the week - salads, curries, noodle dishes, fried rice, soups, omelettes, sandwiches. Bonus is that cooked veg takes up less space in the fridge