Steak & Ale Onion Flatbread Recipe | British Steak Flatbreads on a Plancha BBQ

🥓 Steak & Ale Onion Flatbreads on a Plancha BBQ

If you're looking for a quick but impressive barbecue meal, these steak and ale onion flatbreads are hard to beat. Inspired by the flavours of a traditional British steak and ale pie, this recipe swaps pastry for warm toasted flatbreads, making it lighter while keeping all the rich, comforting flavours.

Tender slices of rump steak are cooked on a hot plancha alongside onions slowly caramelised with a splash of British ale. Finished with mature Cheddar, peppery rocket and a dollop of horseradish crème fraîche, these flatbreads are ideal for relaxed lunches, sharing platters or informal garden gatherings.

The plancha BBQ makes cooking effortless, allowing the steak, onions and flatbreads to cook together while locking in every bit of flavour.

📝 Recipe Overview

Prep Time: 15 minutes

Cook Time: 18 minutes

Total Time: 33 minutes

Serves: 4

Difficulty: Easy

🛒 Ingredients

For the Flatbreads

  • 2 rump steaks (approximately 250g each)
  • 4 flatbreads
  • 2 large onions, thinly sliced
  • 100ml British ale
  • 1 tbsp brown sugar
  • 1 tbsp butter
  • 100g mature Cheddar, grated
  • Handful of rocket
  • 2 tbsp olive oil
  • Sea salt and freshly cracked black pepper

Horseradish Crème Fraîche

  • 150g crème fraîche
  • 2 tsp horseradish sauce
  • 1 tsp wholegrain mustard
  • Freshly cracked black pepper

🔥 Equipment Needed

  • Plancha BBQ
  • BBQ spatula
  • BBQ tongs
  • Mixing bowl
  • Sharp knife

👨🍳 Method

Step 1 – Make the sauce

Mix the crème fraîche, horseradish sauce and wholegrain mustard together.

Refrigerate until ready to serve.

Step 2 – Cook the onions

Preheat the plancha BBQ to medium heat.

Melt the butter before adding the onions.

Cook gently for around 10 minutes, stirring occasionally.

Pour in the ale and brown sugar, then continue cooking until the liquid has reduced and the onions are soft and sticky.

Step 3 – Cook the steak

Increase the heat.

Brush the steaks with olive oil and season well.

Cook for 3–4 minutes per side for medium-rare.

Rest for 5 minutes, then slice thinly against the grain.

Step 4 – Warm the flatbreads

Toast the flatbreads on the plancha for around 1 minute per side.

Step 5 – Assemble

Spread each flatbread with the horseradish crème fraîche.

Top with sliced steak, ale onions, grated Cheddar and rocket.

Fold or serve open-faced.

💡 Cooking Tips

  • Let the onions cook slowly for maximum sweetness.
  • Rest the steak before slicing.
  • Use a good-quality British ale for extra depth of flavour.
  • Warm the flatbreads just before serving.
  • Add the rocket last so it stays crisp.

🌟 Delicious Variations

Blue Cheese Flatbread

Replace the Cheddar with Stilton.

Steak & Mushroom Flatbread

Add garlic mushrooms cooked on the plancha.

Roast Beef Version

Use leftover roast beef for a quick lunch.

Chicken & Ale Flatbread

Swap steak for sliced grilled chicken breast.

Ploughman's Flatbread

Replace the steak with carved ham and extra mature Cheddar.

🍽️ What to Serve with Steak Flatbreads

These flatbreads pair perfectly with:

  • Skin-on fries
  • Homemade coleslaw
  • Potato salad
  • Onion rings
  • Corn on the cob
  • Pickled onions
  • Mixed leaf salad
  • Crispy slaw

🥡 Storage & Leftovers

Store the steak and onions separately in airtight containers in the refrigerator for up to 2 days.

Reheat on the plancha and assemble with fresh flatbreads before serving.

❓ Frequently Asked Questions

Why cook this on a plancha?

A plancha lets you cook the steak, onions and flatbreads together, making it easy to build the perfect sandwich while keeping all the delicious cooking juices.

Can I use another cut of beef?

Yes. Sirloin, bavette or flat iron steak all work wonderfully.

Can I leave out the ale?

Absolutely. Replace it with beef stock or apple juice for a similar richness.

What's the best cheese to use?

A mature British Cheddar melts beautifully and complements the steak perfectly.

Can I make this ahead of time?

The onions and sauce can both be prepared in advance. Simply cook the steak fresh before serving.

🛍️ Shop the Equipment at Sal's Place

A plancha BBQ makes quick, flavour-packed meals easy to prepare, giving you plenty of room to cook steak, vegetables and breads all at the same time.

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Perfect for sharing with family and friends, these steak flatbreads bring the comforting flavours of a British pub favourite to your next outdoor meal.