Cheesy Scalloped Potatoes
["8 to 10 large potatoes, peeled, sliced thin", "1/2 c. margarine", "1/2 c. flour", "3 c. milk", "salt", "pepper", "1/2 c. diced onion", "2 c. finely shredded mild Cheddar cheese"]
["Place potatoes in crock-pot (only fill 2/3 full).", "In saucepan, melt butter; add onion.", "Steam until clear, then add flour stirring constantly on medium heat.", "Add milk and simmer until sauce begins to thicken; remove from heat.", "Add 1 1/2 cups of cheese.", "Cook on low 14 to 16 hours.", "Best when done the night before.", "Place remainder of cheese on top.", "Serve when melted."]
["potatoes", "margarine", "flour", "milk", "salt", "pepper", "onion", "Cheddar cheese"]