Pan-Seared Steak Sandwich with Garlic Mayo and Beetroot
A sophisticated British steak sandwich that transforms simple ingredients into an impressive meal. Juicy pan-seared rump steaks are layered on crispy, charred ciabatta with tangy grated beetroot, peppery rocket, and sweet caramelised onions, all bound together by a punchy garlic-lemon mayonnaise. The magic lies in the contrast of temperatures and textures: hot, tender beef against cool, crunchy vegetables and creamy garlic mayo. This is restaurant-quality fare that takes just 20 minutes from start to finish. Perfect for lunch when you want something special, or a casual dinner that feels indulgent without fuss. Allowing steaks to come to room temperature before cooking ensures even cooking and a better crust, setting this version apart from rushed versions made with cold meat straight from the fridge.
Ingredients
- 4 British rump steakssirloin steaks or ribeye steaks1:1beef
- extra-virgin olive oil, for drizzlinghomemade mayo100gcondiment
fresher flavor, more control
- 7 ½ tbsp mayonnaise with extra-virgin olive oilhomemade mayo100gcondiment
fresher flavor, more control
- 1 small garlic clove
- 1 lemon
- 9 oz baby beetroot in mild malt vinegar
- 4 ciabatta rollssourdough rolls or focaccia1:1bread
different crust texture and flavor
- 4 tbsp caramelised onionsred onion marmalade4tbspcondiment
sweeter, more intense
- 2 handfuls arugula
Instructions
- 1
Remove steaks from refrigerator about an hour before cooking.
- 2
Drizzle steaks with olive oil and season with salt and pepper.
- 3
Heat a griddle pan over high heat.
- 4
Combine mayonnaise in a bowl with finely grated garlic clove and lemon zest.
- 5
Add lemon juice, salt, and pepper to the mayo and stir.
- 6
Grate beetroot on a box grater and set aside.
- 7
When griddle pan is smoking hot, cook steaks in two batches for 2 minutes per side or until desired doneness.
- 8
Rest steaks for a few minutes.
- 9
Return griddle pan to heat.
- 10
Halve ciabatta rolls and drizzle with olive oil.
- 11
Toast rolls cut-side down on griddle for 1-2 minutes in two batches until crisp and lightly charred.
- 12
Spread caramelised onions on bottom half of each toasted roll.
- 13
Top with a steak, then add grated beetroot, arugula, and garlic mayonnaise.
- 14
Replace roll tops and serve immediately.
Tips
Bringing steaks to room temperature for about an hour before cooking ensures even cooking throughout and develops a better golden crust. Cold meat cooks unevenly and may remain tough in the center.
Toast the ciabatta rolls cut-side down on the hot griddle just before assembly. This prevents them absorbing moisture from the steak and mayo while keeping them warm, ensuring the sandwich stays structurally sound.
Grate the beetroot rather than slicing to maximize surface area and flavor distribution. Its earthy sweetness balances the salty caramelised onions and peppery rocket beautifully.
Good to Know
Garlic mayo keeps 3 days in an airtight container in the fridge. Grated beetroot and caramelised onions also last 3-4 days refrigerated. Assemble sandwiches only when ready to serve.
Prepare garlic mayo, grate beetroot, and halve rolls up to 4 hours ahead. Keep mayo and beetroot refrigerated separately. Cook steaks and assemble immediately before serving for best texture.
Serve immediately after assembly on warm plates. Pair with a crisp green salad, coleslaw, or tomato soup. Works equally well as casual lunch or light dinner.
Common Mistakes
Cook steaks straight from the fridge to avoid uneven cooking and tough meat.
Toast rolls immediately before assembly to prevent them from absorbing moisture and becoming soggy.
Don't skip the resting period after cooking steaks to avoid losing juices when cutting.
Substitutions
different crust texture and flavor
fresher flavor, more control
sweeter, more intense
FAQ
Can I use a different cut of beef for this sandwich?
Yes. Sirloin, ribeye, or even fillet steak work well. Adjust cooking time based on thickness: thicker cuts need slightly longer. Thinner cuts like minute steak cook in 1-2 minutes total, so watch carefully to avoid overcooking.
Can I make the garlic mayo ahead of time?
Absolutely. Prepare it up to 3 days in advance and store in an airtight container in the fridge. The garlic flavor actually develops and deepens over time, though it may become slightly stronger. Add lemon juice just before serving if freshness is a concern.
What if I don't have a griddle pan?
A cast-iron skillet or heavy-bottomed frying pan works perfectly for both steaks and toasting rolls. You'll get slightly less charring but the same delicious results. Ensure the pan is very hot before cooking steaks for proper crust development.