The Mazandaran Province is the east of the Gilan Province in Iran, the southern coast of the Caspian Sea is sometime referred to as the fertile Caspian provinces. Citrus fruit, specifically orange crops are grown in this region and influence the cuisine. Historically in Iran, rice is a common food only in the Mazandaran and Gilan Provinces, which is prepared in this region in a kateh cooking style, unlike the typical polos/chelo found in other parts of Iran. Rice crops are grown in the sloping regions of the Alborz mountain range, part of which is in the Mazandaran Province. Seafood is a strong component for coastal Mazandarani cuisine and present in many meals. Persian caviar (ḵāvīar) is incorporated in dishes and often served with egg dishes (some of which are similar to a frittata or omelette). Between 1400 until 1870, the Mazandaran Province was the only place cultivating sugarcane, and it was sometimes eaten with bread and rice.