Beef and Spinach Stir-Fry with Garlic Butter

By AislePrompt Editorial · Published 2026-07-27 · Updated 2026-07-27

Quick stir-fried beef strips with fresh spinach, cooked in a rich garlic butter sauce for a satisfying low-carb dinner. This Asian-inspired keto recipe (low carb), ready in about 18 minutes, pairs sirloin beef strips, fresh spinach, unsalted butter for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 420 calories and feeds 2, so it slots cleanly into a low-carb week and pairs well with cauliflower rice or roasted green vegetables. 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 sirloin beef strips
• 4 cups, washed fresh spinach
• 3 tbsp unsalted butter
• 4, thinly sliced garlic cloves
• 2 tbsp soy sauce
• 1/4 tsp black pepper
• 1 tsp sesame oil

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 unsalted butter in a large skillet over medium-high heat until melted and foamy. Add 12 oz sirloin beef strips in a single layer and sear for 3 minutes without stirring, then stir and cook an additional 2 minutes until browned but still tender.
2. Step 2: Push beef to one side of the skillet; add remaining 1 tbsp unsalted butter and 4 thinly sliced garlic cloves to the empty side. Sauté garlic for 1-2 minutes until fragrant and golden.
3. Step 3: Add 4 cups fresh spinach to the skillet, drizzle with 2 tbsp soy sauce and sprinkle 1/4 tsp black pepper, tossing everything together with 1 tsp sesame oil. Cook for 2-3 minutes until spinach wilts but remains vibrant.
4. Step 4: Remove from heat and serve immediately.