Preparation
Coat a 15x10x1-inch baking pan with nonstick cooking spray; set aside. In a large bowl stir together oats, wheat flakes, Grape Nuts or whole bran cereal, and nuts. In a small saucepan stir together orange juice, honey, allspice and cinnamon. Cook and stir just until boiling. Remove from heat. Pour over oat mixture, tossing just until coated.
2. Spread oat mixture evenly in prepared pan. Bake, uncovered, in a 325 degree oven for 30 to 35 minutes or until oats are lightly borwned, stirring twice. Remove from oven. Immediately turn out onto a large piece of foil; cool completely. If desired, serve with yogurt, milk, and/or fresh fruit.