Divide batter between two smaller loaf pans or into one large loaf pan. Spread evenly. Add the whole walnut halves and place in preheated oven. For smaller loaves bake for 40-50 minutes, or until a skewer inserted into the enter of the loaf comes out clean. For the larger loaf, bake at 60-70 minutes, or until a cake tester comes out clean. Cool loaves in pan on a wire rack for 20 minutes. Invert onto a plate or board. Serve warm with butter or wrap and freeze for future use.