PREHEAT oven to 350°.
In a mixing bowl, CREAM together butter and sugar; ADD egg; MIX well.
In another mixing bowl, COMBINE the flour, baking powder and salt; ADD to creamed mixture.
FOLD in the zucchini, cranberry sauce, walnuts and orange zest (batter will be thick).
TRANSFER to an 8x4-inloaf pan COATED with cooking spray.
BAKE until a toothpick comes out clean, about 40-45 minutes.
LET COOL for 10 minutes before removing from pan to a wire rack.
Per Serving (excluding unknown items): 169 Calories; 5g Fat (28.5% calories from fat); 4g Protein; 27g Carbohydrate; 1g Dietary Fiber; 23mg Cholesterol; 136mg Sodium. Exchanges: 1 Grain(Starch); 0 Lean Meat; 0 Vegetable; 0 Fruit; 1 Fat; 1 Other Carbohydrates.