Spray a 13x9x2 inch (3 qrt)shallow baking dish with cooking spray. Stir the soup, milk and eggs in a (1 qrt) measuring cup or bowl until all ingredients are mixed. Spoon 1/2 cup of the soup mixture into the prepared dish.
spread about 1 tbsp. of the pesto sauce on each bread slice. Place 4 slices in dish. Top with 1/2 cup of cheese. Carefully pour about half of the soup mixture over bread and cheese. Repeat layers with remaining bread slices, 1/2 cup cheese and remaining soup mixture, making sure bread is coated with the soup mixture.
Bake at 350 degrees F for 40 mins. or until center is set. Sprinkle with the remaining cheese. Let stand for 5 mins to let cheese melt.