Crispy Garlic-Soy Beef & Broccoli Stir-Fry

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · Published 2026-04-06 · Updated 2026-04-06

A high-protein, low-carb stir-fry with tender flank steak and crisp broccoli, coated in a savory garlic-soy glaze that cooks in under 20 minutes. This asian-inspired beef (keto, high protein) ready in about 30 minutes pairs flank steak, broccoli, garlic for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 450 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

• 12 oz flank steak
• 2 cups broccoli
• 3 cloves garlic
• 3 tbsp soy sauce
• 1 tbsp sesame oil
• 2 tbsp olive oil
• 1/2 cup onion
• 1 tsp ginger
• 1 tsp cornstarch
• 2 tbsp water
• 1/4 tsp black pepper
• 1/8 tsp red pepper flakes

Instructions

1. Step 1: Place 12 oz thinly sliced flank steak in a bowl, then add 1 tsp cornstarch, 1/4 tsp black pepper, and 1/8 tsp red pepper flakes; toss to coat evenly and set aside for 5 minutes.
2. Step 2: Heat 1 tbsp olive oil in a large skillet over medium-high heat until shimmering. Add the marinated beef in a single layer and sear for 2-3 minutes per side until browned, then transfer to a plate.
3. Step 3: Add the remaining 1 tbsp olive oil to the skillet over medium heat, then add 1/2 cup thinly sliced onion and 1 tsp minced ginger; cook for 2 minutes until softened and fragrant.
4. Step 4: Add 2 cups broccoli florets to the skillet and stir-fry for 3-4 minutes until bright green and crisp-tender, then add 3 minced garlic cloves and cook for 30 seconds until fragrant and golden.
5. Step 5: Return the seared beef to the skillet, then whisk together 3 tbsp soy sauce, 1 tbsp sesame oil, and 2 tbsp water in a small bowl. Pour the sauce over the beef and broccoli, stirring to coat evenly; cook for 2-3 minutes until the sauce thickens and coats the back of a spoon.
6. Step 6: Remove from heat immediately and serve hot, garnished with extra broccoli florets if desired.