1. Preheat oven to 350°.
2. Lightly spoon flours into dry measuring cups; level with a knife. Combine flours and next 3 ingredients in a large bowl. Combine sweetener and next 3 ingredients; add to flour mixture, stirring just until moist.
3. Pour batter into an 8 x 4-inch loaf pan coated with cooking spray. Bake at 350° for 50 to 55 minutes or until a wooden pick inserted in center comes out clean. Cool in pan on a wire rack 10 minutes; remove from pan, and cool completely on wire rack.