Preheat oven to 350 degrees F. Lightly spray an 8- x 4-inch loaf pan with vegetable cooking spray. Combine flour,baking powder,soda,salt and cinnamon. Set aside. Beat eggs and SPLENDA on medium speed with an electric mixer for 5 minutes.
Add oil, applesauce and vanilla. Beat at medium speed 1 minute or until blended. Add flour mixture. Beat at low speed just until blended. Stir in zucchini and walnuts. Spoon batter into prepared pan.
Stir in zucchini and walnuts. Spoon batter into prepared pan.Bake 40 minutes or until cake tester inserted in center comes out clean. Cool in pan on a wire rack 10 minutes. Remove from pan and cool on a wire rack.