In a small skillet, heat a tablespoon of olive oil over medium heat. Add the finely chopped onion and sauté until translucent, about 3-5 minutes.
In a large mixing bowl, combine the ground chicken, sautéed onion, breadcrumbs, egg, chopped parsley, minced garlic, salt, pepper, Italian seasoning, and Parmesan cheese. Mix gently until just combined.
Form the mixture into equal-sized balls, approximately 1.5 inches in diameter, and place them on a baking sheet lined with parchment paper.
Bake for 20-25 minutes, or until cooked through and golden brown.
Prepare your favorite sauce while the meatballs are baking.
Add the baked meatballs to the sauce and gently stir to coat.
Serve the meatballs with spaghetti, on a sub roll, or with a side of garlic bread.
Garnish with additional chopped parsley or grated Parmesan cheese before serving.
Enjoy your meal!
Notes
Store leftovers in an airtight container for up to three days or freeze for up to three months.