Heat roasted peanut oil in a 10-inch heavy skillet over medium-high heat. Add chicken. Cook and stir for 2 minutes. Add peanuts and crushed pepper. Cook and stir 3 minutes more or until chicken is just cooked through. Add soy sauce, sesame oil, and vinegar. Cook and stir 2 minutes more. Remove from heat. Stir in cilantro. Spoon over cabbage or rice. Serve immediately. Makes 4 servings.