This Low-Carb Keto Broccoli Beef Stir-Fry Recipe has fresh crisp-tender broccoli and tender steak smothered in a rich and flavorful sauce. It's super easy to make and has a classic take-out flavor everyone will love.
Slice the flank steak as thinly as possible against the grain. TIP: Freeze the beef for about 30 minutes before slicing, this will help you slice it more thinly. The thinner, the better! Then, place the meat in a large bowl along with the rice vinegar, coconut aminos, and baking soda. Toss to combine. Allow to marinate for 30 minutes at room temperature or up to 8 hours covered in the refrigerator.
Meanwhile, fill a large pot halfway full of water, and bring it to a boil. Add the broccoli florets and boil for 2 - 4 minutes, or until desired tenderness. Drain and set aside.
Prepare the sauce: In a small bowl, combine the xanthan gum and oil. Set aside. In a separate medium-sized bowl, whisk together the remaining sauce ingredients EXCEPT for the minced garlic.
Once the steak has finished marinating, add the avocado oil to a large wok or cast-iron skillet and heat over medium-high heat. Once hot, add the steak in a single layer. Do not overcrowd the pan, cook in batches if needed. Try not to move the meat around so it gets a good sear. Cook until the bottom is browned, then flip over and cook until just cooked through, about 3 or 4 minutes, draining off excess liquid if needed. Set the meat aside and cover with foil to keep it warm.
Add the garlic to the skillet and stir until fragrant, about 30 seconds. Be careful not to burn it!
Add the sauce to the skillet and stir to combine. Then, give the xanthan gum mixture a quick stir and add to the sauce. Stir until thickened, around 3 to 4 minutes.
Remove from heat and stir in the broccoli and beef. Garnish with sesame seeds and serve over cauliflower rice.
Notes
Even though I recommend usingflank steak, flat iron steak or skirt steak can be substituted.
The sherry cooking wine adds a lot of flavor. However, it can be substituted with beef broth. Sherry cooking wine can be found next to the bottles of vinegar at the grocery store.
The fish sauce adds umami and depth of flavor, so I don't recommend omitting it. Fish sauce can be found in the International aisle of most grocery stores.
For added convenience, feel free to use jarred garlic and pre-cut broccoli florets found in the refrigerated section of your grocery store.