01 - Preheat oven to 400°F. Line a baking tray with parchment paper or apply a light coating of oil.
02 - Heat 1 tablespoon olive oil in a skillet over medium heat. Sauté diced onion for 3 to 4 minutes until softened. Add minced garlic and cook for 1 minute longer. Remove from heat and allow to cool slightly.
03 - In a large mixing bowl, blend ground chicken with sautéed onion and garlic, chopped sage, dried thyme, salt, pepper, and an optional pinch of nutmeg.
04 - Add breadcrumbs and lightly beaten egg to the mixture. Gently fold until just combined, taking care not to overmix.
05 - With damp hands, form the mixture into balls using approximately 1 heaping tablespoon per ball. Place each ball onto the prepared baking tray.
06 - Brush or drizzle the chicken balls with the remaining olive oil to promote even browning.
07 - Bake in the preheated oven for 20 to 25 minutes, turning the balls halfway, until golden brown and an internal temperature of 165°F is reached.
08 - Serve hot accompanied by your preferred dip or as part of a composed meal.