Hollandaise Sauce
["2 Tbsp. butter", "1 Tbsp. flour", "1/2 tsp. salt", "1 c. boiling water", "2 egg yolks, beaten", "juice of 1/2 lemon", "1 Tbsp. chopped parsley", "1 tsp. onion juice"]
["Mix butter and flour over low heat.", "Carefully add the boiling water.", "When thickened, remove from heat and gradually add the eggs and other ingredients.", "Reheat gently and serve."]
["butter", "flour", "salt", "boiling water", "egg yolks", "lemon", "parsley", "onion juice"]