Place flour in a shallow bowl. In a large bowl, combine buttermilk and water. In a separate bowl, combine cracker crumbs and cornmeal. Coat onion rings one at a time with flour, dip them in buttermilk, and then dredge in cornmeal mixture. Heat oil in a large saucepan or deep-fryer to 375 degrees F (190 degrees C). .

can you make onion rings with red onions