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Add bread crumbs or crushed butter crackers in the last 5 minutes of baking for a crunchy topping.
1/4 cup margarine
3 tablespoons flour
1 teaspoon salt
3 cups milk
6 potatoes, peeled and thinly sliced
Preheat oven to 325°F. In a large saucepan over medium heat, melt margarine and whisk in flour, salt and pepper. When smooth, gradually add milk. Bring to a boil and stir constantly 3 minutes, until thickened. Place potato slices in a greased 9 x 9-inch baking dish. Add sauce and stir to coat. Cover and bake 30 minutes. Uncover and bake another 20 to 30 minutes, or until potatoes are tender.
Serve with summer squash or other in-season veggies.