Roast Beef and Whiskey Onion Flatbread Sandwiches

Debbie Reid


This is really a quick recipe to put together, the bulk of the time is allowing the onions to soften slowly.


★★★★★ 1 vote

10 Min
30 Min
Stove Top


  • 1 1/2 Tbsp
  • 1 tsp
    lemon juice
  • 1/2 tsp
    dijon mustard
  • 3 Tbsp
    olive oil, divided
  • 1 Tbsp
  • 1 large
    sweet onion, sliced into 1/4-inch slices, then quartered
  • 1/4 tsp
    kosher salt
  • 1/8 tsp
    freshly ground black pepper
  • 1/4 c
    good quality whiskey
  • 8 oz
    thin-sliced deli roast beef, cut into 1/4-inch strips
  • 1 clove
    garlic, minced
  • 2
    (7-inch) white flatbreads
  • 4 oz
    chipotle gouda cheese, shredded

How to Make Roast Beef and Whiskey Onion Flatbread Sandwiches


  1. Preheat oven to 400 degrees. Spray a large baking sheet with non-stick cooking spray; set aside.
  2. In a small bowl, mix together the mayonnaise, lemon juice and mustard; set aside.
  3. Heat 1 tablespoon olive oil and the butter in a medium skillet over medium-low heat. Add in the onion, salt and pepper and cook until softened and lightly browned, approximately 15 - 20 minutes. Remove from heat, stir in the whiskey, mix to combine and until absorbed. Transfer to a small, heat-proof bowl; set aside.
  4. In the same skillet, over medium heat, add in the remaining 2 tablespoons olive oil. Add in the roast beef and garlic, and cook until heated through and the beef just begins to brown, approximately 2 - 3 minutes; set aside.
  5. Place the flatbreads onto prepared baking sheet; evenly spread the mayonnaise mixture onto the flatbreads. Evenly divide the roast beef between the flatbreads, only covering 1/2 of each flatbread; top roast beef evenly with the reserved onions. Top entire flatbread evenly with the cheese. Place into preheated oven and bake until cheese has melted, approximately 3 - 4 minutes. Fold the cheese-only half of the flatbread over the roast beef half. Secure with toothpicks and enjoy!!

Printable Recipe Card

About Roast Beef and Whiskey Onion Flatbread Sandwiches

Course/Dish: Beef Roasts Sandwiches
Main Ingredient: Beef
Regional Style: American

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