Preheat oven to 350°F. In the work bowl of a food processor, combine onion, carrots and celery. Pulse until finely chopped. Add chipotle peppers and pulse until just combined.
In a large bowl, combine the ground turkey with the pepper and vegetable mixture. Add egg whites and oats; gently mix until combined. Place about 1/3 cup of the prepared meatloaf mixture into 9 wells of a standard size muffin pan that has been lightly sprayed with nonstick cooking spray. Bake for 20 minutes.
Meanwhile, combine all of the topping ingredients in a small bowl; set aside. Remove meat loaves from oven and spoon the topping over each meatloaf. Return meatloaf to the oven and continue to bake for an additional 5-10 minutes or until meatloaf is firm and the internal temperature registers 170°F. Let meatloaf stand for 5 minutes before serving. Makes 9 mini loaves.
Source: Biggest Loser