01 - Gently rinse and thoroughly dry the fresh blueberries. Halve them if desired for a more manageable bite.
02 - In a mixing bowl, combine the blueberries, diced cucumber, red onion, jalapeño, and fresh cilantro.
03 - Add the lime zest and juice, sea salt, and freshly ground black pepper. Stir gently to evenly coat all ingredients without bruising the blueberries.
04 - If using, carefully fold in the diced avocado and red bell pepper, taking care to avoid mashing the avocado.
05 - Taste the salsa and adjust the salt, pepper, or lime juice as needed to balance the flavors.
06 - Refrigerate for 10 minutes to allow the flavors to meld, or serve immediately alongside tortilla chips, grilled fish, or chicken.