Singaporean Rice Noodles

Name: Singaporean Rice Noodles
Ingredients: 1 pound rice vermicelli; 5 tablespoons vegetable oil, divided; 2 (16 ounce) bags coleslaw mix; 1 green bell pepper, diced; 1/4 cup frozen peas; 2 green onions, chopped, or more to taste; 3 tablespoons ketchup, divided; 2 tablespoons soy sauce; 2 small skinless, boneless chicken breasts, diced; 2 teaspoons salt; 1 teaspoon ginger-garlic paste; 1 (8 ounce) can tomato sauce; 1 cup water; 1 1/2 teaspoons red pepper flakes, divided; 1/2 teaspoon ground coriander; 1/2 teaspoon ground cumin; 2 1/2 tablespoons water; 2 1/2 tablespoons cornstarch; 1 cup cooked white rice; 1 cup mayonnaise; 1/2 cup ketchup