Scalloped Potatoes For 150
["30 lb. sliced raw potatoes", "3 medium onions, chopped", "1 gal. water", "4 cans (50 oz.) mushroom soup or cream of chicken", "1/2 c. salt", "2 Tbsp. white pepper", "4 c. flour"]
["Arrange potato slices in 4 large metal baking pans.", "Sprinkle each with salt and pepper, each layer.", "Add chopped onion.", "Pour a quart of water over each pan.", "Cover and bake in 425\u00b0 oven that has been preheated.", "Turn oven to 375\u00b0; bake about 30 minutes.", "Mix 1 cup flour with each can of soup; pour over each pan.", "Bake uncovered for about 45 minutes or until done."]
["potatoes", "onions", "water", "mushroom soup", "salt", "white pepper", "flour"]