Preheat the oven to 375°F. Spray a muffin pan with non-stick cooking spray or grease with olive oil.

In a large bowl, combine all the meatball ingredients – ground turkey, bread crumbs, onion, celery, parsley, thyme, sage, salt, and black pepper – either by hand or with a food processor.

Divide the meatloaf mixture into 4 equal portions. Press into prepared muffin cups.

Bake for 30 minutes, until golden brown, and a meat thermometer shows an internal temperature of 165°F. Serve hot.