1. In a small bowl, dissolve cornstarch in 2 tablespoons warm water and set aside.
2. In a medium saucepan, combine soy sauce, water, red wine vinegar, brown sugar, granulated sugar, garlic, and ginger. Simmer over medium heat until sugars dissolve. Stir in cornstarch mixture and cook until thickened, about 2-3 minutes. Add orange zest if using; set aside.
3. Heat oil in a large skillet over medium-high heat. Sauté onion until soft, about 3-4 minutes. Add garlic and cook for another minute.
4. Add ground turkey, breaking it up with a spatula, and cook until halfway done, about 4-5 minutes.
5. Stir in broccoli, carrots, and peas. Cook until turkey is fully cooked and vegetables are tender, 5-7 more minutes.
6. Pour in teriyaki sauce, stir to coat, and simmer for 3-5 minutes. Season to taste with salt, pepper, or add heat with sriracha or red pepper flakes.
7. Serve over rice and garnish with green onions or sesame seeds if desired.