Spray a 7-ounce ramekin or small ovenproof bowl with nonstick cooking spray. Place bread in ramekin. Sprinkle cheese over bread. Add milk to measuring cup, then add egg, Italian seasoning, salt and pepper. Whisk right in the cup, then pour over the bread and cheese in the ramekin. Cover with plastic wrap and refrigerate overnight.
Remove the strata from the refrigerator and let sit at room temperature for about 30 minutes. Preheat oven to 375°F. Place ramekin on small baking pan and bake 20 to 25 minutes or until the strata is set.