Rou jia mo

Rou jia mo is a traditional burger and street food item originating from the province of Shaanxi. The dish consists of a bun (bai ji mo) that's usually stuffed with braised pork belly. Although there are variations, the pork belly is often braised with a mixture of onions, ginger, hot peppers, sugar, soy sauce, various spices (over 20), and Shaoxing wine. The buns date back to the Qin dynasty, while the braised pork dates back to Zhou dynasty. In the past, the buns were baked in a clay oven, but nowadays they're usually cooked in a pan. These small sandwiches are sold by street vendors in Shaanxi, but they're also enjoyed throughout the country, and beef or lamb are often used as a substitute for pork belly.