To Prep ahead of time, cut, clean, and dice sweet bell peppers. You want tiny minced pieces.In a small bowl, mix sour cream, cayenne pepper, white pepper, and half of the diced peppers. Place in the fridge to keep chilled.Separate and wash your Bibb lettuce leaves, and place on napkin to dry.Cook your shrimp on the grill (or sear in a pan) until cooked.Allow shrimp to cool off before assembling the wraps.