In a mixing bowl, whisk together the soy sauce, hoisin sauce, sriracha, rice vinegar, cornstarch, honey, and water until smooth.
In another bowl, season the chicken pieces with kosher salt and freshly ground black pepper.
In a large skillet or wok, heat the olive oil over medium-high heat. Add the seasoned chicken pieces and cook for about 5-7 minutes, stirring occasionally.
Add the minced garlic to the skillet and cook for an additional 1-2 minutes, until fragrant.
Pour the prepared sauce over the chicken in the skillet, stir to combine, and let it simmer for about 3-5 minutes.
Gently fold in the toasted cashews and stir just until they're heated through.
Serve your Cashew Chicken hot, over steamed rice or alongside stir-fried vegetables.