I'm veggie but you could probably adapt these to have some chicken or whatever.
Vegetable soups, e.g. carrot and lentil, or squash and red pepper.
Kebabs with quorn / tofu, courgette, mushroom and pepper. Serve with rice or quinoa
Roasted aubergine, peppers, mushrooms and butternut squash served with couscous or rice
Kidney bean stew with leeks, mushrooms, tomatoes and carrots
Bolognaise made with quorn mince (it's very low fat) and wholemeal pasta as it will fill you up more, or top the bolognaise with potato for a sort of shepherds pie.
Just use as little olive oil as possible when cooking and try to have lots of filling, unprocessed ingredients such as veg, wholegrains, beans and pulses etc. Can't think of many sauces that are healthy - sorry! A nice fresh tomato sauce with onions, mushrooms and basil goes well with lots of dishes, though.