Step 1: Prepare the Meatball Mixture. In a large bowl, combine the ground chicken, finely chopped white onion, salt, black pepper, olive oil, egg, and panko breadcrumbs. Mix the ingredients until thoroughly combined. Adjust seasoning if necessary.
Step 2: Form the Meatballs. Using your hands, shape the mixture into meatballs, each about the size of a golf ball. Ensure they are evenly sized for uniform cooking.
Step 3: Sear the Meatballs. Heat a tablespoon of olive oil in a large skillet over medium-high heat. Once the oil is hot, add the meatballs to the skillet, making sure they are not overcrowded. Sear the meatballs for about 2-3 minutes on each side, or until golden brown on the outside and cooked through.
Step 4: Add the Marinara Sauce. Pour the sugar-free marinara sauce with water into the skillet with the meatballs. Gently toss the meatballs with the sauce to coat them completely.
Step 5: Simmer. Reduce the heat to medium-low and simmer the meatballs in the sauce for an additional 10 minutes, allowing the flavors to meld and the meatballs to heat through.
Step 6: Serve and Garnish. Garnish the meatballs with fresh basil leaves before serving to add a fresh, aromatic touch. Serve the hot chicken meatballs with your favorite side dish. Enjoy this delicious dish as an appetizer or main course.