Preheat oven to 425°.
Combine first 6 ingredients; set aside.
Combine the granulated sugar, cornstarch, 1/2 teaspoon cinnamon, and salt. Place the apple slices in an 11 x 7-inch baking dish, and sprinkle with the cornstarch mixture. Pour 1/4 cup juice concentrate and water over the apple mixture. Top with the oat mixture. Bake at 425° for 25 minutes or until bubbly and golden brown. Let stand for 15 minutes. Serve with ice cream.