Preheat your oven to 400°F and spray a baking sheet with cooking spray. Set aside.
In a large bowl, combine the ground turkey with the egg, panko breadcrumbs, minced green onion, pressed garlic, fish sauce, grated ginger, red curry paste, and salt and pepper. Use a whisk to break the egg yolk and mix everything together until it’s well combined.
Gently knead the mixture with damp hands until everything is evenly incorporated. Cover and refrigerate the mixture for at least 15 minutes.
Use a small scoop to form the meatballs into 1-inch balls and place them on a cutting board. Dampen your hands again and lightly shape and roll the meatballs between your palms.
Place the meatballs evenly spaced on the prepared baking sheet. Bake for about 20 minutes.
While the meatballs are baking, prepare the coconut curry sauce. In a large skillet, heat the canola oil over medium-high heat. Add the sliced onions and red bell pepper and cook for 3 to 4 minutes.
Stir in the ginger and red curry paste, cooking for another 2 to 3 minutes.
Add the coconut milk, brown sugar, and fish sauce. Stir to combine and allow to simmer for about 5 minutes.
Once the meatballs are done baking, add them to the sauce and cook for another 5 minutes. Taste and adjust seasoning if needed.
Finally, garnish with chopped cilantro before serving.