Spicy Chipotle Shrimp Salad

Ingredients:
1 1/2 pounds peeled and deveined large shrimp
1/8 teaspoon salt
1/8 teaspoon freshly ground black pepper
Cooking spray
1/4 cup finely chopped celery
2 tablespoons finely chopped red onion
2 tablespoons chopped fresh cilantro
3 tablespoons canola mayonnaise
1 tablespoon chopped chipotle chile, canned in adobo sauce
2 teaspoons fresh lime juice
1/2 teaspoon ground cumin
8 Boston lettuce leaves