peel and thinly slice potatoes, depending on the size and your crockpot will depend on how many potatoes and onions. Peel and thinly slice onions
Brown hamburger in a skillet add any seasoning you like, drain off excess grease
Place 1/2 the hamburger in bottom of crockpot, top with 1/2 the potatoes and 1/2 the onions. if using mushrooms drain and 1/2 the jar. Repeat layer. Top with mushroom soup. cook on high for 5-6 hours till potatoes are soft. DO NOT stir!!!!!