Cheesey Broccoli Potao Soup

1 carton (32 oz) chicken broth
1/3 cup chopped onion
1 bag (12 oz) frozen chopped broccoli
2 cups milk
1 1/3 cups Potato Buds mashed potatoes (dry)
2 cups chopped cooked chicken
1 cup shredded Swiss cheese (4 oz)
1/2 teaspoon salt
In 3-quart saucepan, heat broth, onion and frozen broccoli to boiling. Reduce heat; cover and simmer 5 minutes, stirring occasionally.
2 Stir in milk and dry potatoes until well blended; stir in remaining ingredients.
3 Heat over low heat about 5 minutes, stirring occasionally, until hot and cheese is melted.