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Herb-Rubbed Top Sirloin Steak with Peperonata

This herb-rubbed sirloin steak with peperonata is a sophisticated high-protein dish that balances rich, savoury beef with the bright, vinegary notes of slow-cooked peppers. The steak is seasoned with a fragrant blend of fresh oregano and thyme, allowing the herbs to infuse the meat during a long marinating period. Paired with a traditional Italian peperonata—a silky medley of peppers, onions, and capers—this recipe offers a vibrant contrast in both texture and flavour that is sure to impress dinner guests.

Perfect for weekend entertaining or a nutritious family meal, this dish is naturally gluten-free and packed with essential nutrients. If you are planning ahead, the peperonata can be prepared up to three days in advance, as its flavours only deepen over time. Serve the sliced steak on a large platter for a communal feel, making it a wonderful centrepiece for any summer gathering or a refined evening at home.

Continue reading below

Ingredients for Herb-Rubbed Top Sirloin Steak with Peperonata

  • 3 tablespoons extra-virgin olive oil

  • 2 small red onions (about 350g total), halved, sliced crosswise

  • 900g mixed red and yellow peppers (about 4 large), cut lengthwise into 1/2-inch-wide strips

  • 1/4 teaspoons dried crushed red pepper

  • Coarse kosher salt

  • 3 tablespoons red wine vinegar

  • 2 tablespoons salt-packed capers, rinsed, drained, or 2 tablespoons capers in brine, drained

  • 1 tablespoon chopped fresh oregano

  • 1 tablespoon chopped fresh thyme

  • 1 tablespoon chopped fresh oregano

  • 1 tablespoon chopped fresh thyme

  • 1 tablespoon freshly cracked black pepper

  • 1 1/2 teaspoons coarse kosher salt

  • 1 (3- to 3 1/4 -pound) top sirloin steak, 2 to 2 1/2 inches thick

  • Extra-virgin olive oil (for drizzling)

How to make Herb-Rubbed Top Sirloin Steak with Peperonata

Heat olive oil in heavy large pot over medium heat. Add onions; sauté until almost tender, about 6 minutes. Mix in peppers and crushed red pepper; sprinkle lightly with coarse kosher salt. Reduce heat to low, cover, and cook until peppers are tender and silky, stirring occasionally, about 35 minutes. Stir in red wine vinegar, capers, oregano, and thyme. Increase heat to medium; stir uncovered 3 minutes. Season peperonata to taste with coarse salt and pepper. Transfer peperonata to bowl and cool to room temperature. DO AHEAD Can be made 3 days ahead. Cover and refrigerate. Bring to room temperature before serving.

Mix oregano, thyme, pepper, and salt in small bowl. Sprinkle evenly over both sides of steak. Place on large plate; cover and refrigerate at least 4 hours and up to 6 hours. Let stand at room temperature 1 hour before grilling. Prepare barbecue (medium-high heat). Drizzle both sides of steak lightly with olive oil. Grill steak to desired doneness, about 15 minutes per side for medium-rare, or 17 minutes per side for medium. Transfer steak to cutting board; let rest 5 minutes. Cut steak crosswise into 1/4 - to 1/3 -inch-thick slices.

Arrange steak slices on platter; surround with peperonata and serve.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 17 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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