Baked Potato Salad

8 potatoes
12 slices bacon
2 onions finely chopped
1 C sliced mushrooms
1 C heavy cream
1/2 C milk
1 1/2 C shredded cheese
salt & pepper

Preheat oven to 325. Butter 8x16" baking dish. Bring a large pot of water to a boil. Add potatoes and cook until tender, about 15 minutes. Drain; cool. Cook bacon over medium heat until evenly browned. Add onions, mushrooms, salt & pepper. Cook until softened. Slice potatoes and place a layer in baking dish. Follow with a layer of bacon mixture; repeat until all ingredients are used. Pour cream and milk over layers, sprinkle with cheese. Bake 35 minutes