Place 4 cups pared, sliced apples in a 1 quart casserole. Combine 3/4 cup orange juice, noncaloric liquid sweetener equal to 1/2 cup sugar, 1 teaspoon ground cinnamon, and 1 teaspoon lemon juice. Pour over apples and toss.

Combine 1 cup graham cracker crumbs with 2 tablespoons melted butter. Sprinkle over apples. Cover with foil and bake at 400 degrees for 25 minutes. Uncover and bake 5 to 10 minutes longer.