Boulets à la Liégeoise balls are then cooked in a pan until golden brown before lowering the heat and letting the meat simmer in a sweet and sour sauce made from onions, vinegar, brown sugar, Liège syrup and Corinthian raisins. The sauce is called "sauce lapin" (literally "rabbit sauce"), not because of any rabbit in the sauce but after Madame Géraldine Lapin, née Corthouts, wife of Ernest Lapin (1868-1922), a tax collector in the suburbs of Liège. A true institution in brasseries and friteries throughout Liège, and known nationwide, this dish is traditionally served with French fries (it is then called "boulets-frites"), mayonnaise, and
French fries side dish to a burger—and both are often used as vehicles for things like sugar-laced ketchup and fatty mayo." Frying french fries in beef tallow, lard, or other animal fats adds saturated fat to the diet. Replacing animal fats with tropical vegetable oils, such as palm oil, simply substitutes one saturated fat for another. For many years partially hydrogenated vegetable oils were used as a means of avoiding cholesterol and reducing saturated fatty acid content, but in time the trans fat content of these oils was perceived as contributing to cardiovascular disease. Starting in 2008, many restaurant chains and manufacturers