Grilled Herb-Marinated Flank Steak with Charred Scallion Salsa

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Juicy flank steak marinated with fresh herbs and garlic, grilled to perfection, and topped with a zesty charred scallion salsa that adds brightness and a smoky kick. This american-inspired grilling ready in about 30 minutes blends pounds flank steak, olive oil, fresh rosemary, chopped into a versatile sauce that lifts everything from grain bowls and roasted vegetables to grilled proteins — a small-batch staple worth keeping in the fridge. Each serving lands at about 350 calories and feeds 4, so a small batch covers several meals across the week without taking over the fridge. 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.

Prep: 15 min Cook: 15 min Serves 4 American cuisine 350 cal/serving
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Ingredients

Instructions

  1. Step 1: In a bowl, combine 1/4 cup olive oil, 2 tbsp chopped fresh rosemary, 2 tbsp chopped fresh thyme, 4 minced garlic cloves, 1 tsp salt, and 1 tsp black pepper to create the marinade. Place 1.5 pounds flank steak in a resealable bag and pour marinade over it. Seal and refrigerate for at least 2 hours or overnight.
  2. Step 2: Preheat grill to medium-high heat (around 450°F). Remove steak from marinade and let excess drip off.
  3. Step 3: Grill the flank steak for 4-5 minutes per side for medium-rare, or until desired doneness. Remove from grill and let rest for 10 minutes on a cutting board.
  4. Step 4: While steak rests, char 6 whole scallions on the grill for about 3 minutes, turning occasionally until blackened and softened.
  5. Step 5: Chop the charred scallions finely and mix with 2 tbsp fresh lemon juice and 1/4 tsp red chili flakes in a small bowl.
  6. Step 6: Slice the rested steak thinly against the grain and spoon the charred scallion salsa on top before serving.

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Frequently asked questions

How long does Grilled Herb-Marinated Flank Steak with Charred Scallion Salsa take to make?

Total time is about 30 minutes (15 min prep + 15 min cook). A small batch typically covers several meals in the week — store as the recipe directs.

How do I store leftover Grilled Herb-Marinated Flank Steak with Charred Scallion Salsa?

Transfer to an airtight jar and refrigerate for up to 5–7 days. Most sauces freeze well for up to 2 months — portion into small containers or freezer bags so you can thaw only what you need. Stir before serving; cream- or yogurt-based sauces may separate on standing.

Can I substitute ingredients in Grilled Herb-Marinated Flank Steak with Charred Scallion Salsa?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Grilled Herb-Marinated Flank Steak with Charred Scallion Salsa for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Grilled Herb-Marinated Flank Steak with Charred Scallion Salsa?

American grilling like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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