"Basil sauce." Pesto. A sauce of basil, pine nuts, garlic, parmesan and pecorino cheese mixed with olive oil and generally served with a pasta such as spaghetti or linguine.
Béarnaise sauce, one of the classic sauces. White wine is reduced with shallots and tarragon and then cooled. Egg yolks and butter are beaten in and the mixture strained and finished with chopped tarragon and sometimes chervil; usually served with steaks, sometimes with lamb.