Wash and dry cabbage. Cut off the end of the cabbage and remove leaves to make "cups" to hold the filling.
Heat oil in large nonstick skillet over medium heat. Add garlic, ginger, and onion. Cook for 2 minutes.
Add turkey, red pepper, and yellow pepper. Cook until the turkey is cooked through, about 8 minutes.
Add water chestnuts, hoisin sauce, sriracha, soy sauce, and rice vinegar.
Cook another 5 minutes and remove from heat.
Add sesame oil and green onion. Stir to combine.
Place a spoonful of the mixture in each cabbage cup to serve.