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Steak-and-Mushroom Reubens

This steak and mushroom Reuben offers a sophisticated, high-protein twist on the classic New York deli sandwich. By swapping traditional corned beef for lean, pan-seared flank steak and earthy shiitake mushrooms, this recipe provides a satisfying depth of flavour while remaining surprisingly light. The combination of peppery steak, fermented sauerkraut and nutty Gruyère cheese creates a complex savoury profile that is perfectly balanced by the sweet tang of Thousand Island dressing and the crunch of toasted rye bread.

Ideal for a nutritious weekend lunch or a quick midweek dinner, these toasted sandwiches are a fantastic way to enjoy a high-quality protein meal that feels truly indulgent. The addition of shiitake mushrooms adds a wonderful meaty texture, making the portions go further while adding essential nutrients. Serve them warm from the pan while the cheese is perfectly melted for the ultimate homemade deli experience.

Continue reading below

Ingredients for Steak-and-Mushroom Reubens

  • 1 tablespoon olive oil

  • 3 teaspoons coarsely ground pickling spice

  • 30g flank steak

  • 12 large fresh shiitake mushrooms, stemmed

  • 12 slices deli rye bread with seeds

  • 35g fat-free Thousand Island dressing

  • 230g drained sauerkraut from jar

  • 170g thinly sliced Gruyère cheese

  • Nonstick olive oil spray

Heat oil in large nonstick skillet over medium-high heat. Sprinkle 1 1/2 teaspoons pickling spice on each side of steak, then sprinkle both sides with salt and pepper. Add steak to skillet and cook to medium rare, about 4 minutes per side. Transfer to cutting board. Add mushrooms to same skillet. Cover and cook until mushrooms are tender, turning occasionally, about 3 minutes. Transfer mushrooms to bowl.

Thinly slice steak on diagonal. Arrange 6 bread slices on work surface. Spread with dressing. Layer each with steak, 2 mushroom caps, sauerkraut, and cheese. Top with remaining bread slices.

Spray 2 large nonstick skillets with nonstick spray. Add sandwiches to skillets; place over medium heat. Cover and cook until bottoms are golden, about 3 minutes. Remove skillets from heat. Remove sandwiches. Spray skillets with nonstick spray. Turn sandwiches over into skillets. Cover and cook until bottoms are golden and cheese is melted, 2 to 3 minutes.

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.

  • 28 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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