I like to make beef stew--it doesn't take long but it lasts in the fridge for a good week (providing it doesn't get eaten by then). I also like to make spinach quiche. Spinach is a great vegetable and it goes well in all kinds of mix-ups.
If you have the time and inclination, learn how to make a cheese sauce from scratch. It doesn't take much longer than a powdered cheese sauce, but it has fewer preservatives and you can use whatever kind of cheese you want. I love making cheese sauces to put over a mix-up of a meat, a starch, and a vegetable--usually spinach or broccoli.
If you want some specific recipes I can send some to you. PM or email me.