In a 3 quart saucepan, heat Swanson chicken broth, onion and Birdseye frozen chopped broccoli, bring to a boil. Reduce heat, cover and simmer for 5 minutes, stirring occasionally.
Stir in Betty Crocker instant mashed potato buds until well blended. Stir in Kraft Swiss Cheese, whole milk and salt. Simmer over low heat about 5 minutes or until hot and cheese is melted, stirring occasionally (after adding cheese, do not allow to come to a boil).