2 cups canned pumpkin puree
2 tablespoons butter
2 eggs, lightly beaten
4 egg whites, lightly beaten
1/2 cup brown sugar
1/2 teaspoon baking soda
1 teaspoon salt
2 teaspoons ground cinnamon
1 teaspoon ground nutmeg
1 teaspoon ground cloves
1 cup low-fat plain yogurt
2 cups dry polenta