Pesto where it is known as "pistou". In contrast with "pesto alla genovese", "pistou" is generally made with olive oil, basil and garlic only: while cheese may be added, usually no nuts are included in a traditional "pistou" because no pine trees grow there to provide the nuts. "Pistou" is used in the typical "soupe au pistou", a hearty vegetable soup with "pistou" flavour. The sauce did not originally contain basil, however; instead, cheese and olive oil were the main constituents. Sometimes almonds are used instead of pine nuts, and sometimes mint leaves are mixed in with the basil leaves. It
Mornay sauce Mornay sauce A Mornay sauce is a béchamel sauce with shredded or grated Gruyère cheese added. Some variations use different combinations of Gruyère, Emmental cheese, or white Cheddar. A Mornay sauce made with cheddar is commonly used to make macaroni and cheese. The name origin of Mornay sauce is debated. It may be named after Philippe, duc de Mornay (1549–1623), Governor of Saumur and seigneur du Plessis-Marly, writer and diplomat, but a cheese sauce during this time would have to have been based on a velouté sauce, for Béchamel had not yet been developed. "Sauce Mornay" does not appear in