Beef and Vegetable Stir-Fry in Soy-Garlic Sauce

By AislePrompt Editorial · Published 2026-06-29 · Updated 2026-06-29

A quick and flavorful stir-fry combining tender beef strips with crisp bell peppers and onions in a savory soy-garlic sauce. This Asian Fusion-inspired beef recipe, ready in about 25 minutes, pairs sirloin steak, thinly sliced, soy sauce, cornstarch for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 1 lb sirloin steak, thinly sliced
• 3 tbsp soy sauce
• 1 tbsp cornstarch
• 2 tbsp vegetable oil
• 1 large red bell pepper, sliced into strips
• 1 large green bell pepper, sliced into strips
• 1 medium yellow onion, sliced
• 4 garlic cloves, minced
• 1 tbsp ginger, minced
• 1 tsp brown sugar
• 1 tsp sesame oil
• 2 stalks green onions, sliced
• 1/4 tsp (optional) red pepper flakes

The wok we’d stir-fry this in → Best Woks for 2026: Carbon Steel, Nonstick & Flat-Bottom Picks + Buying Guide

Instructions

1. Step 1: In a medium bowl, toss 1 lb thinly sliced sirloin steak with 3 tbsp soy sauce and 1 tbsp cornstarch until evenly coated. Set aside for 10 minutes.
2. Step 2: Heat 2 tbsp vegetable oil in a large wok or skillet over high heat until shimmering. Add the marinated beef strips and stir-fry for 2-3 minutes until just browned but still tender. Remove beef and set aside.
3. Step 3: In the same wok, add 1 sliced large red bell pepper, 1 sliced large green bell pepper, and 1 sliced medium yellow onion. Stir-fry for 4 minutes until vegetables are crisp-tender.
4. Step 4: Add 4 minced garlic cloves and 1 tbsp minced ginger to the vegetables and cook for 30 seconds until fragrant.
5. Step 5: Return the beef to the wok and stir in 1 tsp brown sugar, 1 tsp sesame oil, and 1/4 tsp red pepper flakes (if using). Toss everything together for 1 minute until the sauce thickens slightly and coats all ingredients.
6. Step 6: Remove from heat and garnish with 2 sliced green onions before serving with steamed rice or noodles.