Heat the oven to 375°F. Lightly grease an eight-cup muffin pan.
In a large mixing bowl, lightly beat the egg. Add the ground turkey, breadcrumbs, black beans, corn, cheddar, bell pepper, onion, cumin, chili powder, garlic powder, salt, and black pepper.
Add 2 tablespoons of the salsa. Mix gently with clean hands or a fork just until everything is combined. Avoid overmixing so the muffins stay tender.
Divide the mixture evenly among the eight prepared muffin cups. Press it in lightly, leaving the tops slightly rounded.
Spoon the remaining salsa over the tops. Bake until the muffins are cooked through and their centers reach 165°F, about 25 to 30 minutes.
Let the muffins rest in the pan for 5 minutes, then loosen the edges and lift them out. Sprinkle with chopped cilantro before serving.