My previous favourite was meatloaf (with a jar of salsa mixed in). We recently found a new one ...
Ground beef ... very, very well browned
whole onion, chopped coarsely
whole whack of garlic (cloves are best, naturally)
for the gravy, the easy way is a can of mushroom soup, for the purist, add flour to the ground beef, stir well, add spices (cook's preference), add a cup of water
veggies ... either frozen mixed veggies, or if you're ambitious, cut up an assortment of any kind of veggies
Cook till vegies are tender.
Cook up a package of medium sized egg noodles, add the hamburger stuff to the cooked noodles. Serve with homemade baking powder buscuits. Num!
For leftovers, put in a pan with real butter and fry. Even better the seond day!