1 box (4.7 oz) Betty Crocker® au gratin potatoes
2 cups milk
1/2 cup canned Green Giant® Niblets® vacuum-packed whole kernel corn or Green Giant ® Valley Fresh Steamers™ Niblets® frozen corn
1/4 cup chopped celery
1 carton (32 oz) Progresso® chicken broth
1 bag (12 oz) Green Giant® Valley Fresh Steamers™ frozen broccoli cuts
1 1/2 cups shredded Swiss cheese (6 ounces)

1 Heat Potatoes, Sauce Mix and remaining ingredients except cheese to boiling in 4-quart Dutch oven over high heat, stirring occasionally and breaking up broccoli with fork.
2 Reduce heat; cover and simmer 15 to 20 minutes, stirring occasionally, until potatoes are tender.
3 Stir in cheese. Cover and simmer about 5 minutes, stirring occasionally, just until cheese is melted.