Cashew Chicken

Ingredients

• pounds boneless, skinless chicken thighs, trimmed and cut into 1 1/2- x 1/2-inch
• tablespoon Shaoxing wine
• tablespoons soy sauce, divided
• teaspoon Chinese five-spice powder
• teaspoon grated garlic
• plus 1/2 teaspoon cornstarch, divided
• tablespoons canola oil, divided
• raw whole cashews
• dried Thai chiles
• tablespoons water
• plus 2 tablespoons oyster sauce
• tablespoon light brown sugar
• scallions, trimmed and cut crosswise into 2-inch pieces
• small white onion, sliced
• Steamed white rice, for serving