Preheat oven to 400°F (200°C).
In a large mixing bowl, gently combine ground chicken, bread crumbs, Parmesan, lemon pepper seasoning, garlic, parsley, and egg until just incorporated. Do not overwork the mixture.
1 lb. (450 g) ground chicken, ⅓ cup (40 g) plain bread crumbs, ¼ cup (20 g) grated Parmesan cheese, 2 tsps. (about 4 g) lemon pepper seasoning, 2 cloves minced garlic, 1 tbsp. (3 g) chopped fresh parsley, 1 large egg
Use a cookie scoop to portion the mixture evenly and roll into balls with your hands. Place in a greased baking dish and drizzle with olive oil.
1 tbsp. (15 ml) olive oil
Bake for 17–20 minutes, shaking the pan halfway through.
While the meatballs bake, start the sauce. Add ½ tablespoon of butter and garlic to a saucepan over medium heat. Sauté for about 30 seconds, or until fragrant.
2½ tbsps. (35 g) butter, 1 clove minced garlic
Stir in chicken broth, lemon juice, Parmesan, capers, and caper brine. Bring to a boil, then lower the heat and let simmer for about 5 minutes.
1¼ cup (295 ml) low-sodium chicken broth, 2 tbsps. (30 ml) fresh lemon juice, 1 tbsp. (5 g) grated Parmesan cheese, 3 tbsps. (30 g) capers, 1 tbsp. (15 ml) caper brine
Remove from heat and whisk in remaining butter and heavy cream, if using.
1 tbsp. (15 ml) heavy cream
Transfer cooked meatballs to the sauce and warm over low heat until everything is heated through. Serve over pasta, rice, or bread.