Add all ingredients to a large bowl and mix just until combined. Overmixing can make the meatballs dense, so stop as soon as everything is evenly incorporated.
1 pound ground chicken, ¼ cup plain Greek yogurt, ½ cup breadcrumbs, 1 large egg, ½ teaspoon salt, ½ teaspoon onion powder, ½ teaspoon garlic powder, ¼ teaspoon black pepper
Use a cookie scoop to portion the mixture into evenly sized balls, then roll and place on a parchment-lined sheet pan.
Lightly spray or brush the tops with avocado or olive oil for a little extra browning. Bake at 375°F for 15 to 20 minutes, or until the meatballs reach an internal temperature of 165°F.