In the colder months, Sunday nights at our house were almost always a roast chicken with mashed potatoes and lots of veg, boiled, and a fresh salad. When it got warmer, however, Sunday nights were often burgers on the grill and a cold salad plate; something Dad could definitely help with.
These days, with the price of meat (and so many other things) so sky-high, we just cook up whatever I can find on sale during the week.
I do know how to make a pretty nice homemade pizza, so there's always emergency supplies around to make a few of those.