Mashed Sweet Potatoes

In 5- to 6-quart saucepot, place potatoes and enough water to cover; heat to boiling on high. Reduce heat to medium-low; cover and cook 10 to 12 minutes or until potatoes are tender. Drain well.

In same saucepot, melt margarine on medium. Remove saucepot from heat; add soy sauce and potatoes. With potato masher, mash potatoes until almost smooth. Transfer to serving bowl and sprinkle with sliced green onion.