If you would like to make one large key-shaped challah, use a disposable tube pan with the hole in the center. Make 2 cuts on one side of the pan about 2” apart. Cut from the top edge down to the bottom of the pan and flatten the cut strip of foil outward. Make the same type of cuts at one short end of a medium disposable rectangular loaf pan and flatten the cut edge outward as well. Fit the two pans together by tucking each open flap into the other pan. Using about half the recipe above, divide the dough in half, with one half larger than the other; about a 60/40 ratio. Make a simple 3 strand braid from each part. Place the larger braid in the tube pan and the smaller braid in the loaf pan. Allow the challah to rise until the braids meet. Brush with egg wash and bake as directed above.