Oh how I love casseroles (or hot dishes, as they are called here). They are so easy to make and usually clean up is easy too.
1 lb. lean ground beef
1 small onion
canned green beans
1 can low fat cream of mushroom soup
1/4 cup milk
1/2 cup cheddar cheese (optional)
Brown your beef and cook in onion with it. Season it up. Add it to a 8" square pan and mix in the beans, mushroom soup/milk mixture. Mix it all together, if you want to add cheese, sprinkle it on top, then top the entire dish with frozen tator tots. Bake for 30-40 minutes at 350 degrees.