Melt 2 tablespoons butter. Add sherry and boil for 1 minute. Add lobster and allow to stand. Melt the 3 tablespoons butter and add flour. Stir until it bubbles for 1 minute. Remove from heat and slowly stir in cream and the wine drained from lobster. Mix egg yolks with a small amount of the sauce and gradually stir into remaining mixture. Cook over hot, not boiling water, stirring constantly until sauce is thick and smooth, about 3 minutes. Add lobster and turn into shallow casserole. Sprinkle with topping. Bake at 300° for 10 minutes.
Mix first 4 ingredients. Blend in butter and sherry.
