Pepper Serve this main course in hollowed-out tomato cups or lettuce-lined pita pockets. In 8-cup casserole, combine water, bulgur and salt; cover and microwave at high until boiling, 6 minutes. Stir; let stand, covered, for 10 minutes. Add onions, tomatoes, cucumber, parsley and tuna; toss well. Toss with oil and lemon juice; season with pepper and salt to taste. Serve at room temperature.