Pineapple upside down cake

Preheat oven to 325 degrees F (165 degrees C).

In a 10 inch heavy skillet with a heat-resistant handle (I use a cast iron skillet), melt 1/2 cup butter or margarine over very low heat. Remove from heat, and sprinkle brown sugar evenly over pan. Arrange pineapple slices to cover bottom of skillet. Distribute cherries around pineapple; set aside.

Sift together flour, baking powder, and salt.

Separate the eggs into two bowls. In a large bowl, beat egg whites just until soft peaks form. Add granulated sugar gradually, beating well after each addition. Beat until stiff peaks form. In a small bowl, beat egg yolks at high speed until very thick and yellow. With a wire whisk or rubber scraper, using an over-and-under motion, gently fold egg yolks and flour mixture into whites until blended. Fold in sour cream, crushed pineapple and almond extract. Spread batter evenly over pineapple in skillet.