Chicken Chow Mein
["1 Tbsp. vegetable oil", "3 c. diagonally sliced celery", "1/2 c. sliced green onions", "2 1/2 c. hot chicken broth", "3 Tbsp. cornstarch", "1/2 tsp. salt", "1/8 tsp. garlic powder", "1/2 tsp. ground ginger", "1/2 c. cold water", "1 Tbsp. soy sauce", "3 1/4 c. chopped, cooked chicken", "1 1/4 c. chopped green pepper", "2 (6 oz.) cans mushrooms, drained", "1 (8 oz.) can water chestnuts, drained and sliced", "1 (3 1/2 oz.) can chow mein noodles"]
["Heat vegetable oil in a deep, heavy cooking pot.", "Add celery and onion; stir-fry over moderate heat until onion is transparent, but not brown.", "Add chicken broth; cover and cook over low heat 4 to 5 minutes."]
["vegetable oil", "celery", "green onions", "chicken broth", "cornstarch", "salt", "garlic powder", "ground ginger", "cold water", "soy sauce", "chicken", "green pepper", "mushrooms", "water chestnuts", "mein noodles"]