Place Raisins in a small bowl; add enough water to cover. Let stand 10 minutes. Drain, and set aside. Rinse fillets with cold water, and pat dry. Combine flour, sage and pepper; dredge fillets in flour mixture to coat well. Coat a skillet with cooking spray; add margarine, and place over medium heat until margarine melts. Add fillets, lemon juice, and reserved Raisins. Cover; reduce heat, and simmer 10 minutes. Remove cover, and turn fillets. Add wine, sherry, and soy sauce to skillet. Bring to a boil; reduce heat, and simmer 5 minutes or until wine mixture is slightly thickened. Carefully transfer fillets and wine mixture to a serving platter. Garnish with sage leaves, if desired.