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Steak Spice Ciabatta with Caramelised Onions

Warm Steak Spice ciabatta sandwiches filled with sliced beef, caramelised onions and rocket.

This warm steak ciabatta has everything you want from a pub-style sandwich: crusty bread, juicy beef, soft caramelised onions and a sharp creamy dressing. Steak Spice seasons the meat in one easy step.

It is ideal for using rump steak, which has plenty of flavour and becomes beautifully tender when rested and sliced thinly across the grain.

🧾 Ingredients

  • 400g rump steak
  • 1½ tbsp Steak Spice
  • 1 tbsp olive oil
  • 2 large onions, thinly sliced
  • 15g butter
  • 1 tsp soft brown sugar
  • 4 small ciabatta rolls
  • 4 tbsp mayonnaise
  • 2 tsp Dijon mustard
  • 2 handfuls rocket

🍴 Instructions

  1. Heat the butter and half the oil in a frying pan over medium-low heat. Add the onions and sugar, then cook for 20–25 minutes until soft and deep golden.
  2. Pat the steak dry, rub with the remaining oil and coat with Steak Spice.
  3. Heat a heavy pan until very hot. Cook the steak for 3–4 minutes per side, depending on thickness and preferred doneness.
  4. Rest the steak for 8 minutes before slicing thinly across the grain.
  5. Split and lightly toast the ciabatta. Mix the mayonnaise and mustard.
  6. Spread the rolls with mustard mayonnaise, then fill with rocket, sliced steak and caramelised onions. Serve while warm.

⏱️ Timings

  • Prep: 15 minutes
  • Cook: 30 minutes
  • Serves: 4

🥗 Serving Suggestions

Serve with skin-on chips, cornichons or a sharply dressed tomato salad.

💛 Why This Recipe Works

Slow onions bring natural sweetness, while thinly sliced rested steak stays tender. Mustard and rocket cut through the richness without masking the seasoning.

🛒 Get the Blend

Make this recipe with our Steak Spice.

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