Heat griddle or pan on medium high heatPlace egg whites, cinnamon, vanilla extract, and one packet of stevia in a large shallow dishWhisk all ingredients together until well combinedDip each piece of bread in mixture being sure to coat each side thoroughlySpray griddle or pan with cooking sprayCook each side for 3-5 minutes per sideSlice each piece in half and serve on a plateDrizzle maple syrup and sprinkle with stevia before serving