Fill 3-quart saucepan 2/3 full of water; heat to boiling. Add Pasta. Gently boil, uncovered, 12 minutes , stirring occasionally and adding peas during last 2 minutes of cooking. Drain. Rinse with cold water to cool; drain well.
Meanwhile, in large bowl, combine Seasoning and Crouton Blend, oil, mayonnaise and milk. Stir in celery and green onions. Add tuna and cheese; mix well. Stir in cooked pasta.
Cover; refrigerate about 1 hour or until chilled. Place 3 leaves lettuce on each of 4 plates. Divide salad evenly over lettuce; top each with 2 lemon wedges.