Heat margarine over medium heat until hot and bubbly, add shallots and saute until soft, about 1 ominute. Sprinkle with flour and stir quickly and constantly for 1 minute. Gradually stir in wine and bring to a boil. Reduce heat to low, add milk and mustard and cook stirring constanly until thick. (Do not boil) Add lobster and cook until lobster is heated, about 5 minutes, stirring constantly. Stir in all but 2 tablespoons parmesan cheese and remove from heat. Divide mixture into 2 au gratin dishes or 1 1/2 cup casserole dish. In small bowl combine parsley, bread crumbs and remaining 2 tablespoons of parmesan cheese and sprinkle half of mixture over each portion. Broil until topping is browned.