Low Fat Lemon Zucchini Bread

INGREDIENTS

• 1 cup whole wheat flour
• 1 cup flour
• 2/3 cup sugar
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1/4 teaspoon nutmeg
• 1 cup zucchini, grated and tightly packed
• 1/4 cup canola oil
• 1 egg, lightly beaten
• 1 egg white
• 1 teaspoon vanilla
• 1 tablespoon lemon zest
• 1/4 cup plain nonfat yogurt, drained
• cooking spray