Preheat oven to 350° F.
Mix the 2 beaten eggs and 1 cup of milk into a bowl.
Cut the challah into thick slices.
Dunk the thick slices of challah into the mixture of eggs and milk.
Place the challah slices into a suitable-sized pan that has been buttered or sprayed with nonstick spray.
Bake for about 20 minutes or until it is spongy to the touch.
Serve with cinnamon sugar sprinkled on top.