Recipe adapted from POT PIES: COMFORT FOOD UNDER COVER.   Lobster Pie Ingredients 4 tablespoons butter, plus 6 tablespoons melted 1/4 cup flour 1 1/2 cups clam juice 1/4 cup sherry 1/2 cup heavy cream 2 lobsters, cooked, shelled and meat cut into chunks salt and pepper to taste 3 cups soft french bread crumbs 1/3