preheat oven according to pkg directions for tator tots. While oven heats up, dice onion and brown with hamburger meat. put tator tots on cookie sheet and heat and bake til they are not quite done ex:20 out of 30 minutes.add cream of mushroom soup to your skillet of hamburger and onion mix.
poor mixture into 4.8 casserole bakewear. take tator tots and top mixture in even rows until completely covered. Bake uncovered for 10-12 mins. remove from oven and cover with cheese. Place back in oven until cheese melts. Let stand a few mins before serving.