Start by placing the beef flank steak into the freezer for about ten minutes. This makes slicing the beef easier. After the time is up, remove it and slice into ¼-inch thick pieces against the grain. Season the slices evenly with kosher salt and pepper.
Next, prepare the Hunan sauce. In a bowl, whisk together beef broth, low-sodium soy sauce, oyster sauce, rice vinegar, honey, chili paste, and cornstarch. Ensure that the cornstarch is completely dissolved and set this mixture aside.
In a large pan or skillet, add canola oil and heat over high heat. You want the oil to be hot enough that it sizzles when you add a drop of water. Once it’s ready, add the seasoned beef slices to the pan in a single layer. Avoid overcrowding the pan; cook in batches if necessary. Sear the beef for about three to four minutes on each side until browned and cooked through. Remove the beef from the pan and place it on a plate.
If the skillet seems dry, add an extra teaspoon of canola oil. Toss in the broccoli florets, diced peppers, and onions. Stir-fry the vegetables for about four to five minutes until they are just tender but still crisp.
After the vegetables have cooked, add the minced garlic and cook for an additional thirty seconds until fragrant.
Return the beef to the pan with the vegetables. Before incorporating, whisk the reserved sauce again to ensure it’s well mixed. Pour the sauce over the beef and veggies, stirring to combine. Bring the mixture to a gentle boil.
Let it cook for one to two minutes until the sauce has thickened and coats the beef and vegetables nicely. The cornstarch will help create a silky sauce that clings to everything.
Once done, remove from the heat. Serve your Hunan Beef over a bed of hot, steamed rice, garnished with sliced green onions for that finishing touch.
Enjoy your homemade Hunan Beef with friends and family, sharing the joy it brings!