A mayonnaise sauce made with mustard and with finely chopped gherkins (US: dill pickles) and capers, sometimes with anchovies. This is probably best known mixed with julienne of celeriac to make céleri rémoulade.
Amaranth. This covers many varieties of a sweetish green leafy vegetable known by many different names, including callalloo, elephant’s ear, African/Chinese/Ceylon/Indian spinach, Surinam amaranth, basella etc. Most commonly it is a tropical climbing plant that can grow as high as 2 meters (6 ft), the leaves being harvested as the plant grows and cooked in the same way as spinach. In India the most common is Basella alba or Indian Spinach.
Ptarmigan. In Nordic countries and the UK grouse, as it is called there, is most commonly red or willow grouse.