Spiced Zucchini Bars with Cream Cheese Frosting

4 eggs
2 cups sugar
3/4 cup oil (I usually use Canola oil in baking, but had luck with olive oil in this recipe.)
2 cups flour
2 teaspoons baking soda
2 teaspoons cinnamon
1/2 teaspoon ground cloves
1/2 teaspoon ground nutmeg
3/4 cup chopped walnuts (optional)
2-3 cups grated zucchini

Preheat oven to 350 degrees.
Combine eggs and sugar in using mixer.
Beat in oil until creamy.
Add dry ingredients and beat well.
Stir in grated zucchini until well blended.
Pour into a greased and floured 10 x 15 pan.
Bake for 30 minutes, or until pick inserted in center comes out clean.

For frosting:
3 tablespoons softened butter
2 8 oz. packages cream cheese, softened
1 1/2 cup powdered sugar
2 tsp. vanilla

Beat frosting ingredients together until creamy.
Spread on COOLED bars.