In a stand mixer bowl fitted with a paddle attachment, combine 1 1/2 cups flour, yeast, brown sugar, salt, and cinnamon; mix well. Add warm water and shortening to flour mixture. Add egg. Blend at low speed until moistened; beat 3 minutes at medium speed. Gradually stir in apples, walnuts, and enough of the remaining flour to make a soft batter. Spread batter in greased tube pan or 9-inch square cake pan.