In a large saucepan, melt margarine over low heat. Whisking constantly, add flour and cook until it is smoothly combined and bubbling (about one minute).
Gradually whisk in the soy milk, ½ cup at a time. Continue whisking constantly for about 5 minutes or until sauce begins to thicken. Don' allow sauce to boil.
Blend in mushrooms. Cover and continue simmering, stirring occasionally. Allow to cook for 7 minutes or until the mixture is reduced by half.
Remove saucepan from heat. Stir in sherry, salt, and pepper, blending until smooth. Serve hot.
Fat: 2.01 grams
Saturated Fat: 0.32 grams
Carbohydrates: 2.39 grams
Calcium: 6.10 mg
Lactose: 0.0 grams