Heat the oven to 375°F. Line a rimmed baking sheet with parchment paper.
In a large bowl, combine the ground turkey, stuffing mix, egg, 2 tablespoons of the salsa, black beans, cumin, chili powder, and salt. Mix gently until evenly combined.
Shape the mixture into a compact loaf on the prepared baking sheet. Spread the remaining salsa over the top.
Bake for 40 to 45 minutes, until the center reaches 165°F on an instant-read thermometer. Let the meatloaf rest for 5 minutes before slicing.
While the meatloaf bakes, stir together the corn, red onion, cilantro, and lime juice in a small bowl. Spoon the corn salsa over the slices just before serving.