Scalloped Potatoes And Ham 2 tablespoons butter 2 tablespoons all-purpose flour 2 teaspoons salt 2 cups milk 6 cups sliced potatoes 1 to 2 cups diced ham Preheat oven to 350. In saucepan, melt butter. Stir in flour and salt. Slowly add milk, stir until thickened. Slowly add potatoes. Continue stirring until mixture boils. Add ham. Spoon into greased casserole. Bake for 35 minutes, or until potatoes are tender.