The recipe yield is:
Try with beef, veal or fish. Heat margarine in 1-1/2-quart saucepan over low heat until melted. Cook and stir onion in margarine until onion is brown; discard onion. Stir flour into margarine. Cook over low heat, stirring constantly, until flour is deep brown; remove from heat. Stir in broth, white wine, parsley, gherkins, onion and chervil. Heat to boiling, stirring constantly. Boil and stir 1 minute. Stir in salt and pepper. 1 CUP SAUCE; 50 CALORIES PER TABLESPOON.