Bordelaise sauce is a classic French sauce made primarily from red wine, shallots, and bone marrow. It is typically enriched with a reduction of beef stock, which gives it a rich, deep flavor. This sauce is often served with red meats, enhancing their taste and providing a luxurious touch to dishes. The sauce is named after the Bordeaux region in France, known for its fine wines. Traditionally, Bordelaise sauce is prepared by simmering the ingredients together, allowing the flavors to meld. It is a staple in French cuisine and is appreciated for its complexity and depth.