This is an old favorite of ours -- a quick, easy dish that also freezes well and is very filling. I think it's from a Betty Crocker Cookbook.
1 lb ground beef
2 cans pinto or kidney beans, rinsed and drained
1 8-oz can tomato sauce
1/2 c salsa
1 t chili powder
1 c shredded cheese
Heat oven to 375 degrees. Cook beef in a skillet over medium heat until browned; drain. Mix all ingredients, except the cheese, in an ungreased casserole. Cover and bake 40 - 45 minutes, stirring once or twice. Sprinkle with cheese. Bake, uncovered about 5 minutes more or until cheese is melted.