Stir-Fried Lemongrass Beef with Bell Peppers

By AislePrompt Editorial · Published 2026-06-16 · Updated 2026-06-16

Tender strips of beef stir-fried with aromatic lemongrass and colorful bell peppers for a vibrant Vietnamese-inspired dish. This Vietnamese-inspired beef recipe, ready in about 25 minutes, pairs beef sirloin, lemongrass stalks, red bell pepper for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 3, 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

• 12 oz, thinly sliced beef sirloin
• 2, finely minced lemongrass stalks
• 1 medium, sliced into strips red bell pepper
• 1 medium, sliced into strips green bell pepper
• 3, minced garlic cloves
• 3 tbsp soy sauce
• 1 tbsp fish sauce
• 1 tsp brown sugar
• 2 tbsp vegetable oil
• 1/2 tsp black pepper
• 2, sliced green onions
• 1/4 tsp (optional) chili 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: Heat 2 tbsp vegetable oil in a large wok over medium-high heat until shimmering. Add 3 minced garlic cloves and 2 finely minced lemongrass stalks; stir-fry for 45 seconds until fragrant but not burnt.
2. Step 2: Add 12 oz thinly sliced beef sirloin to the wok and stir-fry for 2 minutes until the edges start to brown.
3. Step 3: Stir in 1 sliced red bell pepper and 1 sliced green bell pepper; cook for 3 minutes until peppers soften but retain crunch.
4. Step 4: Pour in 3 tbsp soy sauce, 1 tbsp fish sauce, and 1 tsp brown sugar, tossing everything together. Cook for 1 more minute until sauce thickens slightly and coats the beef and vegetables.
5. Step 5: Season with 1/2 tsp black pepper and 1/4 tsp chili flakes if using. Remove from heat and garnish with 2 sliced green onions before serving.