One of our family favorites. Original recipe taken from www.cdkitchen.com
1 lb uncooked bratwurst, casings removed
1 medium onion, chopped
1 can (10 3/4 oz) condensed cream of mushroom soup
1 (16oz) container of sour cream
shredded cheddar cheese
Crumble bratwurst into a large skillet. Add onion. Cook over medium heat until meat is no longer pink; drain. Stir in the soup. Transfer to a greased 13x9 inch baking dish or a 2qt casserole dish. Top with sour cream and then a single layer of tater tots. Sprinkle with cheddar cheese. Bake uncovered at 350 degrees for 35-40 minutes or until heated through and cheese is melted. Let stand for 5 minutes before serving.