Combine lentils and water in saucepan. Bring to a boil, reduce heat, cover and simmer 6 to 8 minutes for red lentils, 10 to 12 for brown. Drain and cool.

Meanwhile, mix vinegar, lemon juice, mustard, and oil.

Combine cooked lentils with dressing, rice, broccoli, celery, carrots, green pepper, onion, parsley, tomato. Chill several hours. Makes 7 1-cup servings.