In a large bowl, combine the first 5 ingredients. In a small bowl, beat the sugar, bananas, tofu, oil and and vanilla. Beat into dry ingredients just until moistened. Fold in walnuts., Transfer to an 8x4-in. loaf pan coated with cooking spray. Bake at 350° for 50-55 minutes or until a toothpick inserted in the center comes out clean. Cool for 10 minutes before removing from pan to a wire rack.