Add 1 cup water. Cover and bake at 325° for 2-1/2 to 3 hours or until the meat is tender.
Meanwhile, for noodles, combine flour and salt in a bowl; make a well in the center. Beat egg and milk; pour into well. Stir to form a stiff dough. Turn onto a well-floured surface; roll into a 15x12-in. rectangle.
Cut into 1/8-in. strips. Cover and refrigerate until ready to cook.
Remove roast and keep warm; add broth and remaining water to pan. Bring to a boil; add noodles. Cook for 8-10 minutes or until tender.