Miniketo
ES

Keto Dinner

Lemon Basil Pesto Flat Iron Steak

A grilled flat iron steak slathered in vibrant lemon basil pesto turns an ordinary weeknight into something special. I love how the bright citrus and fresh herbs cut through the richness of the beef, making each bite feel light yet satisfying. This keto-friendly meal comes together quickly and brings big flavors without much fuss.

15 min Prep time 8 min Cook time 23 min Total time 6 Servings 480 Calories
Lemon Basil Pesto Flat Iron Steak

Ingredients

  • cloves garlic
  • cups packed fresh basil leaves
  • /3 cup pine nuts
  • /2 cup extra-virgin olive oil
  • /2 cup freshly grated Parmesan cheese
  • /2 tablespoons fresh lemon juice
  • /4 teaspoon red pepper flakes
  • (6 ounce) flat iron steaks
  • large cloves garlic, minced
  • salt and pepper to taste

Instructions

  1. Step 1

    Start by making the pesto. Drop 4 garlic cloves into a food processor and pulse until finely minced. Add the fresh basil and pine nuts, then give it a few quick pulses to roughly combine. With the motor running, slowly drizzle in the olive oil—stop once or twice to scrape down the sides—until the mixture looks cohesive. Toss in the Parmesan, lemon juice, and red pepper flakes, pulsing until just blended. Taste and adjust with salt and pepper. Set the pesto aside. Rub the steaks all over with the minced garlic, then season generously with salt and pepper. Let them sit at room temperature while you fire up the grill to medium-high heat. Lightly oil the grates. Place the steaks on the grill and cook for about 4 minutes per side for a perfect medium, basting a few times with a little pesto as they cook. I always let the steaks rest off the heat for a few minutes before serving—this locks in every bit of juice. Slice against the grain and spoon the remaining pesto on top. The herby, garlicky, lemony finish makes it a standout keto dinner.

Chef's Tip

I toast the pine nuts in a dry pan for a minute before adding them to the processor—it wakes up their flavor and adds a subtle nuttiness that really elevates the pesto. Also, always grate your own Parmesan; pre-shredded just doesn't melt into the sauce as smoothly.

Storage Tips

Store leftover pesto in an airtight container with a thin layer of olive oil on top to prevent browning; it keeps for up to 5 days in the fridge. Reheat the steak gently in a skillet over low heat or enjoy it cold sliced over a salad.

Variation Tips

Serve the steak over a bed of zucchini noodles tossed in extra pesto for a complete keto plate. You can also swap the flat iron for flank steak or chicken thighs—just adjust the cooking time accordingly.

Frequently Asked Questions