Sift flour with baking soda and salt. Add bread crumbs; blend well.
Cut in shortening until fine and mixture resembles meal. Combine egg, milk, molasses, and vinegar. Add the milk mixture to dry ingredients; stir until blended. Turn into two greased loaf pans 8 1/2 x 4 1/2 inches. Bake at 375° for 35 to 40 minutes.
Calories per serving: 217