01 - Preheat the oven to 400°F (200°C). Line a baking tray with parchment paper or grease it lightly.
02 - In a skillet, heat 1 tablespoon olive oil over medium heat. Sauté diced onion for 3 to 4 minutes until soft. Add garlic and cook for 1 minute more. Remove from heat and allow to cool slightly.
03 - In a large mixing bowl, combine ground chicken, the sautéed onion and garlic, sage, thyme, salt, black pepper, and optional nutmeg.
04 - Add breadcrumbs and the lightly beaten egg. Mix gently until just combined, being careful not to overwork the mixture.
05 - With damp hands, shape the mixture into balls using a heaping tablespoon per portion. Place each ball on the prepared baking tray.
06 - Drizzle or brush remaining olive oil over the chicken balls. Bake for 20 to 25 minutes, turning halfway through, until golden brown and cooked to an internal temperature of 165°F (74°C).
07 - Serve hot with your preferred dipping sauce or as part of a larger meal.