Flat Iron Steak Sandwich with Griddled Onions - The Measured Scoop

Flat Iron Steak Sandwich with Griddled Onions - The Measured Scoop

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Indulge in a mouthwatering grilled flat iron steak sandwich on sliced ciabatta bread with a tangy sauce, griddled onions, and crispy greens.

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Ingredients

  • 1 lb flat iron steak
  • 1/4 cup olive oil, divided
  • 1 large onion
  • salt and pepper
  • 4 ciabatta buns or other rustic bread
  • salted butter for the bread
  • 2-4 cups textured greens like arugula, mizuna, frisee, or baby kale
  • 2/3 cup mayonnaise
  • 2 tablespoons barbeque sauce
  • 2 tablespoons hotdog relish
  • 2 teaspoons Anything Seasoning Blend
  • 1 Tablespoon Worcestershire sauce
  • 2 -4 teaspoons hot sauce like Cholula

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