1 lb beef sirloin, thinly sliced against the grain
2 cups mushrooms, sliced (button, cremini, or shiitake)
1 red bell pepper, sliced into thin strips
3 cloves garlic, minced
1 tbsp fresh ginger, grated
3–4 green onions, sliced (whites and greens separated)
2 tbsp chili paste (such as sambal oelek)
3 tbsp low-sodium soy sauce
1 tbsp brown sugar
1 tbsp rice vinegar
2 tbsp high-heat cooking oil (avocado or peanut)
1 tsp sesame oil
1 tsp cornstarch mixed with 1 tbsp water
1 cup broccoli florets, small pieces (optional)
1 cup bean sprouts (optional)
1 tbsp sesame seeds, for garnish
Instructions
Slice beef sirloin against the grain into thin strips (about 1/8-inch thick). Pat dry with paper towels.
Prepare all vegetables: slice mushrooms, red bell pepper, mince garlic, grate ginger, and slice green onions (keeping whites and greens separate).
Combine sauce ingredients in a small bowl: soy sauce, chili paste, brown sugar, rice vinegar, and cornstarch slurry. Stir well and set aside.
Heat a wok or large skillet over high heat. Add 1 tbsp oil and swirl to coat.
Add white parts of green onions, garlic, and ginger. Stir-fry for 30 seconds until fragrant.
Add beef in a single layer and let sear for 1 minute without stirring. Then stir-fry for 1-2 more minutes until browned but still slightly pink. Transfer to a plate.
Add remaining oil to the pan. Add mushrooms and cook for 2-3 minutes until they begin to brown.
Add bell pepper (and optional broccoli) and stir-fry for another 2 minutes until vegetables are crisp-tender.
Return beef to the pan along with any accumulated juices. Pour in the prepared sauce.
Toss everything together and cook for 1-2 minutes until sauce thickens and coats everything evenly.
Turn off heat and drizzle with sesame oil. Add bean sprouts if using and toss once more.
Transfer to a serving dish and garnish with green onion tops and sesame seeds.
Serve immediately over steamed rice or noodles.
Notes
For best results, don’t overcrowd the pan – cook in batches if necessary.
Slice the beef while it’s still slightly frozen for the thinnest, most tender strips.
Adjust the chili paste amount to control the spice level.
Nutrition facts are estimates and may vary based on ingredients used, portion sizes, and preparation methods.