Line 9x5-inch loaf pan with foil, with ends of foil extending over sides; spray with cooking spray. Combine 2 cups flour, baking powder and salt. Beat 1/2 cup butter and 1 cup sugar in large bowl with mixer until light and fluffy. Blend in eggs, 1 at a time. Add flour mixture alternately with sour cream, mixing well after each addition. Stir in 1 cup cherries and 1/3 cup nuts.