01 - Preheat oven to 400°F. Line a baking tray with parchment paper or lightly grease with olive oil.
02 - In a skillet, heat 1 tablespoon olive oil over medium heat. Sauté diced onion for 3 to 4 minutes until softened. Add minced garlic and cook 1 minute longer. Remove from heat and allow to cool slightly.
03 - In a large mixing bowl, combine ground chicken, sautéed onion and garlic, chopped sage, dried thyme, salt, black pepper, and optional nutmeg.
04 - Add breadcrumbs and beaten egg to the chicken mixture. Mix gently until ingredients are just combined, taking care not to overwork the mixture.
05 - With damp hands, portion the mixture into balls using approximately 1 heaping tablespoon for each. Place evenly spaced on the prepared baking tray.
06 - Brush or drizzle each chicken ball with the remaining tablespoon of olive oil.
07 - Bake for 20 to 25 minutes, turning the balls halfway through, until golden brown and fully cooked. Internal temperature should reach 165°F.
08 - Serve hot as an appetizer, main course, or alongside your chosen accompaniments.