In a medium bowl, whisk together the olive oil, lime juice, lime zest, chili powder, cumin, salt, and garlic.
Place turkey breasts in a tupperware container and drizzle with marinade, making sure to coat both breasts completely.
Let marinate for at least 30 minutes, up to overnight.
While the turkey is marinating, make the salsa.
In a medium bowl, combine the corn, jalapeño, cilantro, lime juice, cumin, and salt. Cover and refrigerate until ready to use.
Preheat the grill to medium-high heat.
Grill the turkey breasts for 12-15 minutes on each side, or until a meat thermometer reads 165 degrees F. Cooking time might vary slightly depending on how large the turkey breasts are.
Serve topped with the corn salsa.
Enjoy!