Creamy Broccoli Au Gratin Soup
["2 Tbsp. butter or margarine", "1/2 c. chopped onion", "1 3/4 c. water", "1 (4.5 oz.) pkg. Uncle Ben's Country Inn broccoli rice au gratin", "1/4 c. flour", "1/4 tsp. dry mustard", "1 3/4 c. chicken broth", "2 c. milk", "1/2 c. shredded Cheddar cheese", "1 green onion, minced"]
["Cook onion in butter in a large saucepan until tender.", "Add water, rice and seasoning packets.", "Cover and cook over low heat 20 minutes.", "Combine flour and dry mustard in a small bowl.", "Gradually add about 1/2 cup of the broth, stirring until smooth.", "Stir remaining broth, flour mixture and milk into rice mixture.", "Heat to a simmer, stirring occasionally.", "Continue simmering until slightly thickened.", "Stir in cheese.", "Sprinkle with green onion.", "Serves 4 to 6."]
["butter", "onion", "water", "Uncle Ben's", "flour", "dry mustard", "chicken broth", "milk", "Cheddar cheese", "green onion"]