In a large saucepan, heat oil over medium-high heat. Add onion and bell pepper; cook until tender, about 5 minutes. Add shrimp, paprika, salt, cumin, coriander, garlic powder, and pepper; cook, stirring occasionally, until shrimp are pink and firm, about 5 minutes. Remove from heat; stir in lime juice. Cover and refrigerate until cooled, at least 30 minutes.
Stir in cilantro. Using a slotted spoon, place about 2 tablespoons shrimp mixture in center of each lettuce leaf. Garnish with avocado, radish, and cilantro, if desired. Serve immediately.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/cilantro-lime-shrimp-lettuce-wraps/