Meatless Reuben Sandwich 1 slice rye bread Zucchini 2 to 3 tablespoons sauerkraut Onion Green bell pepper 1 slice mild Cheddar or Swiss cheese Drain sauerkraut well, placing it in a wire strainer and then pressing with the back of a spoon to force the liquid out. Cut zucchini into thin slices. Cut thin rings from the onion and green pepper. Toast the bread. Spoon drained sauerkraut onto toasted bread. Arrange 4 or 5 zucchini slices on top, then add a few onion and green pepper rings. Top with the cheese slice. Place in a preheated oven or under the broiler until the cheese melts.