3 cups diced, cooked potatoes
¼ cup chopped green onions (scallions)
6 tablespoons butter or margarine
3 tablespoons flour
1 ½ cups milk
¾ cup shredded cheddar cheese
¾ cup shredded gruyere cheese
2 heaping teaspoons minced garlic
salt and pepper
1 cup soft bread crumbs
Place potatoes in a shallow, broiler-proof baking dish and season. Then gently mix onions in. In a saucepan over medium-low heat, melt 6 tablesoons butter. Remove 3 tablespoons of butter to a cup or bowl; set aside.
To the remaining 3 tablespoons of butter in the saucepan, add flour. Stir to blend well; gradually stir in milk. Continue cooking, stirring constantly, until sauce is thick and smooth. Add cheese and garlic and continue stirring until cheese is melted. Pour sauce over potatoes in baking dish; mix gently. Place bread crumbs in a bowl; drizzle with remaining 3 tablespoons melted butter; toss to coat. Sprinkle buttered bread crumbs evenly over potatoes.
Bake potatoes au gratin at 400° for about 15 minutes to heat through, then broil until golden brown. Recipe for potatoes au gratin serves 4.
