To make this recipe, start by prepping the beef. Add the thinly sliced steak to a large bowl and toss it well with the avocado oil, dark soy sauce, and arrowroot or cornstarch. Set it aside to marinate briefly while you prep everything else.
Next, make the sauce. In a small bowl, whisk together the beef broth, oyster sauce, maple syrup, dark soy sauce, sesame oil, and arrowroot or cornstarch until fully combined. Set the sauce aside.
Then, prep your vegetables — trim the asparagus and cut it into 2-inch pieces, slice the onion thin, mash the garlic, and have your ginger ready to go. Stir fries move fast, so it's worth having everything prepped before the pan goes on.
Heat the avocado oil in a large skillet over medium-high heat. Once the pan is hot, add the beef in a single layer and cook until browned and almost cooked through. Remove the beef from the pan and set it aside.
In the same pan, add the sliced onion, ginger, and garlic. Sauté for about 2 minutes, then add the asparagus. Stir and cook for another 3-4 minutes, or until the asparagus is just tender but still has a little bite to it.
Pour in the sauce and add the beef back to the pan, tossing everything together to coat well.
Once the sauce has thickened to your liking, remove the pan from the heat. Serve the beef and vegetables over warm rice and enjoy!