Preheat oven to 350°F. In medium bowl, combine flour, baking soda, and salt; set aside. In large bowl, cream butter and sugar with electric mixer until light and fluffy. Add eggs, lime juice, vanilla, banana and lime zest; mix well. Add flour mixture alternately with sour cream; blend thoroughly but do not overmix. Pour into prepared pans. Bake 20-25 minutes or until toothpick inserted comes out clean. Cool 10 minutes in pan on rack; remove and cool completely before decorating.