Stir-frying is a quick and healthy cooking technique that originated in China thousands of years ago. The high heat and constant motion quickly cook the ingredients while sealing in flavor and nutrients. Beef and vegetables are the most common stir-fry ingredients. This recipe combines sliced beef with classic Chinese seasonings for a quick weeknight meal with a kick of spice. Szechuan cuisine is known for its bold, spicy flavors created by garlic, chilies, Sichuan peppercorns, and the tongue-numbing Szechuan peppercorn. Put on a pot of rice to serve this flavorful beef stir-fry, along with a side of steamed vegetables.