Green Colouring for Mayonnaise
This may be made of mixed herbs or spinach. If herbs are used take 1 tablespoon of parsley, 1 of watercress, and 1 of chervil, put them into boiling water, let them cook eight minutes, then drain and pound in a mortar, and press the pulp through a fine sieve. Use this with mayonnaise to make a light delicate green colour.
If spinach is used press 1 tablespoon of chopped spinach through a sieve, and use it to colour the sauce.