Heat a large saute pan over medium high heat and preheat oven to 400 degrees. Prep a sheet pan lined with parchment paper.
To the heated saute pan, add 1 teaspoon of avocado oil and the prepped cabbage, mushrooms, ginger and scallions. Sauté for 3-5 minutes until softened. Stir in garlic and saute an additional 1-2 minutes. Let veggies cool down for 10-15 minutes.
To a large bowl, add ground turkey and remaining meatball ingredients including the cooled sautéed vegetables. Combine well- careful not to overmix. Let mixture chill 15-20 minutes for easier rolling.
Drizzle sheet pan with avocado oil and add some to your hands to form meatballs. Using a 1-inch cookie scoop, scoop each meatball, rolling into your hands, forming 34-36 meatballs.
To the same large saute pan, wipe excess oil or veggies out and heat over medium high heat for 3-4 minutes. Add remaining avocado oil and a single layer of meatballs, careful not to overcrowd. Brown meatballs on each side for 2-3 minutes- transfer to sheet pan and continue to brown in batches. Meatballs won't be fully cooked- we will finish them in the oven.
When all meatballs are browned and on the sheet pan, transfer to oven for a final 5 minutes until meatballs are just cooked through, you don't want to overcook them.
While meatballs are baking, add the Gyoza dipping sauce ingredients to a small bowl and whisk to combine. Serve meatballs alongside dipping sauce and enjoy!