Heat oven to 350°F. Lightly grease bottom and sides of 15x10x1-inch pan with shortening or spray with non-stick cooking spray. In large bowl, beat eggs, granulated sugar, oil and pumpkin until smooth. Stir in flour, baking powder, cinnamon, baking soda, salt, ginger and cloves. Stir in raisins, if using. Spread in pan.