London Broil, Aged Cheddar and Watercress on Croissant with Horseradish Mayonnaise Recipe -
London Broil, Aged Cheddar and Watercress on Croissant with Horseradish Mayonnaise Recipe
  • READY IN 15 mins

London Broil, Aged Cheddar and Watercress on Croissant with Horseradish Mayonnaise

Recipe by  

"Sandwich warm beef, white cheddar, crunchy watercress, and a spicy horseradish mayonnaise on a rich croissant, and you've got a sandwich that's extra-special and company worthy!"

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Original recipe makes 4 servings Change Servings
  • PREP

    10 mins
  • COOK

    5 mins

    15 mins


  1. Whisk together the mayonnaise, Dijonnaise and horseradish in a small bowl, season with salt and pepper.
  2. Heat a grill pan or griddle over medium heat. Add 3 slices of beef in an even layer, next to each other and cook for 30 seconds per side, just to warm through. Top the slices 1 or 2 slices of the cheese, cover with a lid and let melt, about 20 seconds.
  3. Spread some of the mayonnaise on each both sides of each croissant. Layer on beef, cheese, onion and watercress.
Kitchen-Friendly View


  • *Or you can grill your own marinated flank steak: Flank Steak – let marinate for at least 2 hours and up to 24 hours. Heat a grill to high or a grill pan over high heat until smoking. Season the steak with salt and lots of black pepper and cook on both sides until golden brown and slightly charred and cooked to medium-rare doneness, about 6 minutes per side. Remove from the heat and let rest 10 minutes before slicing into thin slices against the grain of the meat.

Reviews More Reviews

Feb 03, 2012

Wonderful sandwich! Plus it was a great way to use up some leftover London Broil that I had grilled. I didn't bother re-heating the meat in a pan, just assembled the sandwich and had it cold subbing some butter lettuce for the watercress and adding some crisp bacon and thin sliced tomato - delicious!


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  • Calories
  • 635 kcal
  • 32%
  • Carbohydrates
  • 30.9 g
  • 10%
  • Cholesterol
  • 130 mg
  • 43%
  • Fat
  • 42.6 g
  • 66%
  • Fiber
  • 2.2 g
  • 9%
  • Protein
  • 31.5 g
  • 63%
  • Sodium
  • 1683 mg
  • 67%

* Percent Daily Values are based on a 2,000 calorie diet.

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