Start by making the sauce. Add the soy sauce, brown sugar, sesame oil, grated garlic, grated ginger, cornstarch, water, and chili garlic sauce to a bowl. Mix together to combine and set the sauce to the side.
Dice the onion. Slice the zucchini into rounds, then cut the rounds into quarters.
Heat a large skillet over medium heat and add the oil. Once the skillet is hot, add the diced onion and chopped zucchini. Sauté for about 4-5 minutes until the onion starts to become translucent and the zucchini is lightly browned. Remove the veggies to a separate plate and set aside.
In the same skillet, add the ground turkey. Crumble and cook until browned.
Now add the sautéed veggies back to the skillet with the browned turkey. Give the sauce another stir, then pour the sauce over the veggies and ground turkey mixture.
Give everything a stir and let the sauce simmer for 2 minutes to thicken and soak into the turkey and zucchini mixture.
Remove the skillet from the heat. Serve hot with sliced green onions, red pepper flakes, sesame seeds, and cooked rice (all optional). Enjoy!