Combine first 4 ingredients in large skillet; cover and bring to a boil. Reduce heat and simmer for 10 minutes. Add salmon, cover, lower the heat some more and simmer another 10 minutes. Remove skillet from heat and let stand for 8 minutes. Remove salmon to serving plate; set aside.
Creamy Horseradish Sauce: In a bowl, combine last five ingredients (mayo through green onions). Serve with salmon.
Notes
SERVING SUGGESTIONS: Serve with steamed baby red potatoes, green beans and carrots.