 Fish dishes are especially common in the Mithila region of North Bihar due to the number of rivers, such as the Sone, Gandak, Ganges and Koshi.Dairy products are consumed frequently throughout the year, including dahi (yogurt), spiced buttermilk (known as mattha), ghee, lassi and butter.Dishes for which Bihar is famous include Bihari kebabs, "litti chokha", Bihari "boti", Bihari chicken masala, "sattu paratha" (parathas stuffed with roasted gram flour), "chokha" (spicy mashed eggplant and potatoes), fish curry and "posta-dana ka halwa".