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Grilled Steak Sandwiches with Brie, Roasted Peppers, and Watercress

These steak sandwiches with Brie and roasted peppers offer a sophisticated take on a classic high-protein lunch. By using tender beef fillet seasoned with fragrant herbes de Provence, the dish achieves a wonderful depth of flavour that pairs perfectly with the creamy texture of chilled Brie and the subtle heat of Dijon mustard. Homemade roasted peppers add a gentle sweetness, while fresh watercress provides a crisp, peppery finish to every bite.

Ideal for those seeking a substantial, protein-rich meal, these sandwiches are excellent for garden parties, weekend lunches, or even a luxury picnic. The beef and peppers can be prepared a day in advance, making this recipe a stress-free option for entertaining. Serve these ciabatta rolls on their own or with a light green salad for a balanced and satisfying homemade feast.

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Ingredients for Grilled Steak Sandwiches with Brie, Roasted Peppers, and Watercress

  • 3 large red peppers

  • 450g beef tenderloin, trimmed

  • 2 tablespoons extra-virgin olive oil

  • 2 tablespoons dried herbes de Provence

  • 6 ciabatta rolls

  • 90ml mayonnaise

  • 90ml Dijon mustard

  • 230g Brie, chilled, cut into 1/4-inch-thick slices

  • 2 cups (loosely packed) watercress

  • 6 hard-boiled eggs, peeled, sliced

How to make Grilled Steak Sandwiches with Brie, Roasted Peppers, and Watercress

Char peppers over gas flame or in grill until blackened on all sides, turning occasionally. Transfer to medium bowl. Cover with plastic wrap and cool. Peel, seed, and cut peppers lengthwise into 1/2-inch-wide strips. (Can be made 1 day ahead. Cover and refrigerate.)

Brush beef with oil; sprinkle with herbes de Provence, salt, and pepper. Let stand 30 minutes at room temperature.

Prepare barbecue (medium-high heat). Grill beef to desired doneness, turning occasionally, about 30 minutes for rare. Transfer beef to plate. Chill uncovered until cold, about 4 hours.

Slice beef. Cut rolls horizontally in half. Spread mayonnaise and mustard over cut sides of rolls. Arrange beef, Brie, watercress, eggs, and pepper strips on bottom half of rolls. Cover with roll tops. (Can be made 1 day ahead. Wrap in foil and refrigerate.)

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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