Heat oven to 350 degrees. Grease an 8- x 4-inch loaf pan or 8- x 8-inch square pan and set aside. In a large bowl, combine cornmeal, sugar, salt, flour, baking powder and baking soda. In a separate bowl, mix buttermilk, eggs and oil with an electric mixer. Pour the buttermilk mixture into the cornmeal mixture and stir well.
Stir in the onion, green pepper, jalapenos, pimentos and corn. Pour mixture into prepared pan and bake 18 minutes or until a toothpick comes out clean. If using a square pan, check bread for doneness after 12-15 minutes. Serve hot.
Approximate values per serving: 166 calories, 7 g fat, 31 mg cholesterol, 4 g protein, 22 g carbohydrates, 1 g fiber, 374mg sodium, 39 percent calories from fat.