1. Combine rice, shrimp, salt, lemon juice, pepper, onion, olives, and cauliflower in a salad bowl.
2. Toss together well.
3. Combine french dressing, pepper, and mayonnaise, mix well.
4. Spoon dressing over salad, toss again.
5. Chill thoroghly.
6. Serve over lettuce.