In a large skillet preheat 1 teaspoon sesame oil over medium-high heat for about 1 minute. The sesame oil adds great flavor to the dish, but if you don’t have any you can substitute with canola or vegetable oil. Add beef, onion, garlic and ginger to the skillet. Cook, breaking up the meat as you stir, until the beef is no longer pink and the onion is tender (about 5-7 minutes). Drain, and return meat to skillet. Stir teriyaki sauce into the beef mixture. Bring to a low simmer and cook for an additional 3-5 minutes, just until sauce thickens slightly. Serve over rice, in tortillas, or in lettuce wraps. Notes *Tip: I like to use frozen diced onion for recipes like this, because it eliminates any prep work!