In a medium bowl, combine the soy sauce, peanut butter, white wine vinegar, cayenne pepper, and salt. Set aside.
In a large skillet, heat oil over high heat. Sear chicken in batches, until golden on each side, about 2 minutes per side (it won't be cooked through the center). Reduce heat to medium and add the garlic and ginger. Continue to cook for another minute, until they're fragrant.
Add the broccoli, green onions, peanuts, and soy sauce/peanut butter sauce.
Add the coconut milk and cilantro, and stir to combine. Continue to simmer until the broccoli is tender and the chicken has cooked through entirely, about 5 minutes.
Dish with additional cilantro, peanuts, and green onions, over cauliflower rice or rice. Enjoy!