green tomato recipe

4-5 medium green tomatoes - 1/2 cup all-purpose flour - 1/2 cup cornmeal - 1/2 cup breadcrumbs - 1 teaspoon salt - 1/2 teaspoon black pepper - 1/4 teaspoon cayenne pepper (optional) - 2 large eggs - 1/2 cup buttermilk - Vegetable oil for frying