Garlic Roasted Fish Fillet

Name: Garlic Roasted Fish Fillet
Ingredients: 1 tablespoon cornstarch; 1 egg white; 12 ounces of freshwater fish filets; 1 head garlic peeled, but not crushed; 1 tablespoon vegetable oil; 15 small dried red hot chilies; 1 teaspoon sliced ginger; 2 teaspoon thinly-sliced scallion; 1 tablespoon soy sauce; 1 cup chicken stock; Pinch of salt; Pinch of sugar (optional)