Tuna and White Bean Lettuce Wraps

Ingredients

• 1 can (12 ounces) light tuna in water, drained and flaked
• 1 can (15 ounces) cannellini beans, rinsed and drained
• 1/4 cup chopped red onion
• 2 tablespoons olive oil
• 1 tablespoon minced fresh parsley
• 1/8 teaspoon salt
• 1/8 teaspoon pepper
• 12 Bibb or Boston lettuce leaves (about 1 medium head)
• 1 medium ripe avocado, peeled and sliced