The cuisine of Senegal is a West African cuisine influenced by North African, French, and Portuguese cuisine and derives from the nation's many ethnic groups, the largest being the Wolof. Islam, which first penetrated the region in the 11th century, also plays a role in the cuisine. Senegal was a colony of France until 1960. Ever since its colonization, emigrants have brought Senegalese cuisine to many other regions. Because Senegal borders the Atlantic Ocean, fish is very important in Senegalese cooking. Chicken, lamb, peas, eggs, and beef are also used, but pork is not due to the nation's largely Muslim population. Peanuts, the primary crop of Senegal, as well as couscous, white rice, sweet potatoes, lentils, black-eyed peas and various vegetables, are also incorporated into many recipes. Meats and vegetables are typically stewed or marinated in herbs and spices, and then poured over rice or couscous, or eaten with bread. Popular fresh juices are made from bissap, ginger, bouye (pronounced 'buoy', which is the fruit of the baobab tree, also known as "monkey bread fruit"), mango, or other fruit or wild trees (most famously soursop, which is called corossol in French). Desserts are very rich and sweet, combining native ingredients with the extravagance and style characteristic of the French impact on Senegal's culinary methods. They are often served with fresh fruit and are traditionally followed by coffee or tea. Tea, known as attaya, is served in a ritualistic fashion. Meals Thieboudienne or chebu jën (among other names)—"The Rice of Fish." Dubbed as the national dish of Senegal, it consists of flavoursome fish that has been marinated with parsley, lemon, garlic, onions (and other herbs), then later cooked with tomato paste and a variety of vegetables such as lettuce, cabbage, and carrots. Rice is later added to the mix giving it a reddish look. Thiébou yapp or chebu yap—"The Rice of Meat." It is very popular with the Senegalese and is usually cooked with beef (or lamb) that is first fried and garnished with onions, garlic, black pepper, red pepper, and salt (and other ingredients). Mustard and water are later added to the mix for the meat to tenderize and soak up all the flavours. As with chebu jën, rice is then added to the mix and tends to be garnished with either green olives or cooked black-eyed peas. Thiébou guinar or chebu ginaar—"The Rice of Chicken." The preparation and procedures