Another important aspect of northern cuisine is the presence of wheat, especially in the use of flour tortillas. The area has at least forty different types of flour tortillas. The main reason for this is that much of the land supports wheat production, introduced by the Spanish. These large tortillas allowed for the creation of burritos, usually filled with machaca in Sonora, which eventually gained popularity in the Southwest United States. The variety of foodstuffs in the north is not as varied as in the south of Mexico, because of the mostly desert climate. Much of the cuisine of this area is dependent on food preservation techniques, namely dehydration and canning. Dried foods include meat, chiles, squash, peas, corn, lentils, beans and dried fruit. A number of these are also canned. Preservation techniques change the flavor of foods; for example, many chiles are less hot after drying. In Northeastern Mexico, during the Spanish colonial period, Nuevo León was founded and settled by Spanish families of Jewish origin (Crypto-Jews). They contributed significantly to the regional cuisine with dishes, such as Pan de Semita or "Semitic Bread" (a type of bread made without leavening), capirotada (a type of dessert), and cabrito or "baby goat", which is the typical food of Monterrey and the state of Nuevo León, as well as some regions of Coahuila. The north has seen waves of immigration by the Chinese, Mormons, and Mennonites, who have influenced the cuisines in areas, such as Chihuahua and Baja California. Most recently, Baja Med cuisine has emerged in Ensenada and elsewhere in Baja California, combining Mexican and Mediterranean flavors. The cooking of Oaxaca remained more intact after the conquest, as the Spanish took the area with less fighting and less disruption of the economy and food production systems. However, it was the first area to experience the mixing of foods and cooking styles, while central Mexico was still recuperating. Despite its size, the state has a wide variety of ecosystems and a wide variety of native foods. Vegetables are grown in the central valley, seafood is abundant on the coast and the area bordering Veracruz grows tropical fruits. Much of the state's cooking is influenced by that of the Mixtec and, to a lesser extent, the Zapotec. Later in the colonial period, Oaxaca lost its position as a major food supplier and the area's cooking returned to a more indigenous style, keeping only a small number of foodstuffs, such as chicken and pork.