Preheat the oven to 400ºF and line a large rimmed baking sheet with parchment paper. In a large bowl, combine the ground turkey, sweet potato, salt, thyme, garlic powder, and black pepper. Use a fork to mix the ingredients until the mixture looks relatively uniform.
Use a 1-ounce cookie scoop to scoop the meatball mixture and drop it onto the lined baking sheet. Repeat the remaining mix, creating about 24 balls. Use wet hands to shape the balls, if needed. (Getting your hands damp wet will prevent sticking.)
Bake the meatballs at 400ºF for 15 minutes, or until the center of the meatballs reaches 165ºF with an instant-read thermometer. The tops will not look golden, but the bottom of the meatballs (where they touched the pan) should be light brown.
Serve the meatballs warm in your favorite sauce. Leftovers can be stored in an airtight container in the fridge for up to 4 days.
