Combine the black beans, corn, tomatoes, bell pepper, red onion, avocado and cilantro in a large bowl.
Add the lime juice, garlic powder, sea salt and jalapeño, if using.
Gently toss until everything is evenly coated.
Chill for 20–30 minutes before serving to allow the flavors to blend.
Serve with baked tortilla chips or spoon over baked potatoes, grain bowls or salads.