I find one of the best and most versatile dishes is a stir fry. Get a load of veg and chop it up (red and yellow pepper, baby corn, sugarsnap peas, mushrooms, garlic and chillies if you want, etc etc etc) throw in a bit of chicken, then put some sauce on it (the jars are fine, sweet chilly, sweet and sour, Korma, Tikka, whatever you like) and serve with rice. Easy, healthy (you can get up to double your five a day in one portion depending what veggies you put in, plus protien from the chicken and carbs from the rice) and quick.
Or if you fancy Italian, get some mushrooms, peppers, sweetcorn, peanuts or cashew nuts and some chicken, cook them and throw them into a pan with some cooked pasta, then stir in some pesto, either home made or shop bought, doesn't make much of a difference. Easy!
at the weekend i made sweet potato falafel, really easy - and you don't deep fat fry them you bake them. Mix up some baked sweet potatoes, gram flour, coriander, lemon juice and then scoop into balls and bake for 15 mins - great.