Korean Sesame Beef with Lettuce Wraps

This recipe is based on the classic Korean barbecue dish bulgogi, which offers savory beef with garlic wrapped in lettuce leaves, with rice and kimchi.
Slice the steak across the fibers in 1/4-inch-thick slices; cut the slices into 1/2-inch-wide strips. Cut strips into 3-inch-long pieces. Combine the steak pieces, 1/4 cup onion, sugar, soy sauce, garlic, and sesame oil.Preheat a 14-inch wok skillet over high heat. Add 1 tablespoon of canola oil to the wok and stir to coat. Add half of the steak mixture to the wok; cook for 2 minutes or until lightly browned. Spoon the prepared steak mixture into a bowl. Repeat with the remaining 1 tablespoon of canola oil and the remaining steak mixture. Sprinkle with the remaining onion and sesame seeds. Add 1/4 cup rice, about 2 tablespoons steak mixture, and 1 tablespoon kimchi to each lettuce leaf; roll up. Serve immediately.