Smoked Salmon-Potato Gratin

Steps

• 1

  Fill 4-quart saucepan two-thirds with water; heat to boiling over high heat. Cook sliced potatoes in water 6 to 9 minutes or until almost tender; drain and return to saucepan.
• 2

  Heat oven to 350°F. Spray 3-quart casserole with cooking spray.
• 3

  In 12-inch nonstick skillet, melt 2 tablespoons butter over medium heat. Cook and stir leeks in butter about 5 minutes or until softened. Stir in flour. Gradually stir in half-and-half. Heat to boiling. Remove from heat. Stir in cheese, dill, salt and pepper until cheese is melted.
• 4

  Pour sauce over potatoes in saucepan. Spoon half of potato mixture into casserole. Top with half the salmon. Repeat layers.
• 5

  Stir together bread crumbs and melted butter; sprinkle over potato mixture. Bake uncovered 30 to 40 minutes or until potatoes are tender and topping is golden brown.