Break eggs into a large, shallow mixing bowl. Add apple sauce and cinnamon. Using a fork or whisk, gently whip mixture until well blended. Set aside. Melt butter in a large skillet or griddle over medium heat. Dip bread, one slice at a time, in egg mixture (be sure to coat both sides). Place coated slices carefully into the skillet and allow to cook 2-3 minutes per side until golden brown.