Beef and Pepper Stir-Fry with Coconut Aminos
Thin strips of sirloin seared fast and tossed with bell peppers, broccoli, ginger, and garlic in a glossy coconut aminos and toasted sesame oil sauce, finished with scallions and sesame seeds.
Why You'll Love This Recipe
This is a fast, savory weeknight dinner for anyone who wants a hot, satisfying plate without a long ingredient list or a stack of dishes. Everything cooks in one wok in under half an hour, and the flavors read as familiar takeout while the ingredients stay simple and whole. It suits cooks who like a quick, protein-forward meal that still feels indulgent thanks to the glossy sauce and toasted sesame finish.
Get the wok hotter than feels sensible, then leave the beef alone long enough to brown. Searing the beef hard in a very hot wok develops a deep, roasted flavor on the surface of the meat, and slicing the sirloin thinly against the grain keeps each bite tender. Coconut aminos stands in for a soy-style sauce with a mellower, slightly sweet edge; reducing it for the last couple of minutes concentrates that flavor into a glaze rather than leaving the vegetables sitting in liquid. Ginger and garlic go in near the end so they stay bright and aromatic instead of burning.
A generous amount of protein sits alongside vegetables that keep some crunch, so the plate feels substantial without being heavy. The sirloin is rich and filling, the peppers bring natural sweetness and color, and the broccoli adds fiber and body. The sesame oil and sesame seeds carry a nutty aroma that makes the whole dish smell like a treat, while the coconut aminos gives that craveable savory depth with only a modest amount of sodium.
Ingredients
- 1 1/2 lb sirloin, thinly sliced and seared
- 3 bell peppers, sliced
- 3 cups broccoli florets
- 4 tbsp coconut aminos
- 1 tbsp toasted sesame oil
- 2 tbsp avocado oil
- 1 tbsp grated fresh ginger
- 4 cloves garlic, minced
- 4 scallions, sliced
- 1 tbsp sesame seeds
Instructions
- Slice the beef: Pat the sirloin dry, then thinly slice it against the grain into strips no thicker than a pencil. Slicing across the grain shortens the muscle fibers so the cooked beef stays tender rather than stringy. If the meat feels too soft to slice cleanly, firm it up in the freezer for 15 minutes first.
- Prep the vegetables and aromatics: Cut the bell peppers into thin strips, discarding the stems and seeds. Cut the broccoli into bite-sized florets. Peel and finely grate the ginger, mince the garlic, and thinly slice the scallions. Have everything within reach of the stove, because stir-frying moves quickly once the wok is hot.
- Sear the beef: Set a wok or large skillet over high heat until it is very hot, then add the avocado oil. Lay the beef strips in a single layer, working in batches so the pan stays hot and does not crowd, and sear undisturbed for about a minute until deeply browned, then toss and cook another minute until just cooked through. Browning builds the savory, roasted flavor of the dish. Transfer the beef to a plate.
- Stir-fry the vegetables: Add a little more avocado oil to the same wok if it looks dry. Add the broccoli and bell peppers and stir-fry over high heat for 4 to 5 minutes, keeping them moving, until the peppers soften slightly and the broccoli turns bright green and crisp-tender. A pale green, squeaky floret needs another minute.
- Cook the aromatics: Push the vegetables to one side of the wok, add the ginger and garlic to the cleared space, and cook for about 30 seconds, stirring constantly, just until fragrant. Watch closely so the garlic does not scorch and turn bitter.
- Combine and finish: Return the seared beef and any juices to the wok, pour in the coconut aminos and toasted sesame oil, and toss everything together over high heat for about 2 minutes until the sauce reduces slightly and coats the beef and vegetables in a glossy glaze. Garnish with the sliced scallions and sesame seeds and serve hot.
Variations
- Swap the protein: Use thinly sliced boneless chicken thighs or peeled shrimp in place of the sirloin. Both cook fast over high heat, though shrimp needs only a couple of minutes and is done the moment it turns pink and opaque.
- Add some heat: Stir in red pepper flakes or a sliced fresh red chili along with the ginger and garlic for a warming kick that plays well against the mellow, slightly sweet coconut aminos.
- Change the vegetables: Trade the broccoli for cauliflower florets, sliced mushrooms, zucchini half-moons, or thin carrot coins. Add denser vegetables like carrots a minute earlier so they soften in step with the peppers.
- Bright citrus finish: Add a squeeze of fresh lime juice and a little grated lime zest at the very end, off the heat, to lift the savory sauce with a fresh, tangy edge.
- Serve it over cauliflower rice: Pulse cauliflower florets into rice-sized pieces and stir-fry them in a little avocado oil until tender, then spoon the beef and vegetables over the top so the glaze soaks in.
Storage & Leftovers
Store leftovers in an airtight container in the refrigerator for up to 4 days. Let the stir-fry cool for a few minutes before sealing it so trapped steam does not turn the broccoli soggy, and keep any extra sauce pooled at the bottom of the container.
Reheat quickly over high heat in a hot skillet or wok rather than the microwave, which tends to overcook the beef and soften the vegetables. A minute or two of tossing brings back some sear and gloss; add a small splash of water if the sauce has thickened too much in the fridge.
To get ahead, slice the beef and cut the peppers and broccoli up to a day in advance, storing them in separate covered containers so the vegetables stay dry and crisp. Grate the ginger, mince the garlic, and slice the scallions the morning of, and the actual cooking will take only minutes once you sit down to eat.
Notes & Tips
- Firm the beef for clean slices: Pop the sirloin in the freezer for about 15 minutes before slicing. Slightly firmed meat is far easier to cut into thin, even strips, which is the difference between tender and chewy.
- Get the wok truly hot: Let the pan heat until the oil shimmers and thins out before the beef goes in. A pan that is not hot enough will steam the meat gray instead of searing it brown.
- Do not crowd the pan: Sear the beef in batches with space between the strips. Piling it all in at once drops the heat and the meat releases liquid instead of browning.
- Coconut aminos runs sweeter: Coconut aminos is milder and a touch sweeter than a soy-style sauce and less salty, so taste at the end and season with a pinch of salt if you want more savory depth.
- Judge the broccoli by color: The broccoli is ready when it turns vivid green and still has a little bite. Dull, olive-green florets mean it has gone past crisp-tender.
- Toast the sesame seeds: If your sesame seeds are raw, toast them in a dry pan over medium heat for a couple of minutes until golden and fragrant to deepen their nutty aroma before sprinkling on top.
Nutrition & Mindful Eating
- The beef and the vegetables never really merge here, and that is the point. The sirloin stays browned and tender, the peppers stay sweet and crunchy, the broccoli stays green, and the sauce coats all three while softening none of them.
- Sirloin sliced thin cooks through almost the moment it touches the pan, which is how it stays tender, and it brings complete protein along with the iron and B12 that make a stir-fry eat like dinner.
- Bell peppers turn sweeter the moment they hit heat while keeping their snap, and their vitamin C is at its highest right at that point, while they still have some bite.
- Toasted sesame oil goes in off the heat, where its aroma survives, and the seeds scattered over the top add a small toasty crunch along with a bit of calcium and unsaturated fat.
- Ginger, garlic and scallions are the smell of this dish. The ginger and garlic go into the hot oil first and bloom in seconds, and the scallions land raw at the end so there is something sharp and green cutting through the sauce.
- As you eat, catch the toasted sesame first, then the crunch of the pepper against the tender beef, and give yourself a moment between forkfuls to notice how full you already are.
Frequently Asked Questions
What is coconut aminos and what can I use instead?
Coconut aminos is a savory, slightly sweet sauce made from the fermented sap of coconut palm, and it stands in for a soy-style sauce here. If you have run out, a splash of beef broth reduced down with a little salt will give a similar savory backbone, though it will be less sweet.
Which cut of beef works best if I cannot find sirloin?
Flank steak, flat iron, or top round all work well as long as you slice them thinly against the grain. These cuts stay tender when seared fast over high heat and sliced the right direction.
Why did my beef turn out tough and chewy?
The two usual causes are slicing with the grain instead of across it, and overcooking. Cut the strips against the grain so the fibers are short, sear them hard and briefly, and pull them from the pan as soon as they are just cooked through.
Can I make this for meal prep during the week?
Yes. It keeps in the refrigerator for up to 4 days and reheats best in a hot skillet rather than the microwave. Portion it into containers once cooled, and reheat quickly so the beef stays tender and the vegetables keep some bite.