Saute shallots in margarine over medium heat unti tender (4-5 minutes). Stir in mushrooms and parsley; saute until all liquid is absorbed (8-10 minutes). Stir in mustard, thyme, 1/4 teaspoon each salt and pepper; cool. Stir in liver pate; set aside. Saute fillets in margarine over medium heat until internal temperature registers 130 F-135 F (3-4 minutes per side). Remove fillets and sprinkle each with dash of salt and pepper; set aside. Blend flour into pan drippings; cook 3 minutes stirring constantly. Stir in consomme and Madeira. Bring to boiling, stirring constantly; boil 1 minute. Stir 1 tablespoon sauce into mushroom mixture. Cover remaining sauce; refrigerate. On lightly flour surface, roll each sheet of puff pastry to 1/8" thickness. Cut each sheet in half. Spoon 1/4 of mushroom mixture onto center of each piece of pastry; top with steak. Fold pastry overlapping only enough to seal; trim if necessary. Pinch edges to seal, moistening lightly with water. Place seam side down on well-greased baking sheet. Refrigerate, covered, several hours.