Whisk egg, milk, sugar, cinnamon and vanilla in a square 6”x8” pan. Lay bread in egg mixture and let rest for 10-15 minutes, flipping once, to allow the bread to soak up the liquid.
Heat skillet over medium heat and coat with cooking spray.
Transfer bread slices to pan and cook, flipping once, until bread reaches desired brownness, 3-4 minutes per side. Remove to plate.
Top French toast with fruit, jam or syrup, if desired, and serve immediately.
1 serving, 300 calories (French toast only)
Hack: This recipe can be doubled or tripled for multiple servings and frozen for up to 3 months. Lay cooked french toast on a baking sheet and place in the freezer until frozen. Wrap toast tightly and store in the freezer. To reheat, microwave, covered with a damp paper towel, for 15-second intervals until hot. Alternately, warm in the oven for 8-10 minutes or pop in the toaster.