Cantonese Fried Chicken

Ingredients

• 2 1/2 - 3 1/2 lbs fryer, cut up
• 3 tablespoons brown gravy
• 1 teaspoon salt
• 1 teaspoon sugar
• 1 cup cooking oil
• 1/4 teaspoon pepper
• 3 tablespoons butter
• 1 (4 ounce) can water chestnuts
• 1 1/2 cups sliced fresh mushrooms
• 1 cup chicken broth
• 1 tablespoon soy sauce
• 1/2 teaspoon salt
• 1/2 teaspoon sugar
• 1 tablespoon cornstarch
• 1 tablespoon water
• green onion (optional)