Name: Steak Sarnies with Sticky Onions & Blue Cheese Recipe
Prep time: 10 min
Cook time: 25 min
Total time: 35 min
Cuisine: British
Ingredients: 2 tbsp unsalted butter; 1 red onion, thinly sliced; 2 tbsp Worcestershire sauce; ½ tbsp light brown soft sugar; 40g stilton, crumbled; 2 tbsp mayonnaise; 1 large sirloin or rump steak (about 350g); 4 slices sourdough bread; handful of rocket, to serve

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Introduction

Steak sarnies with sticky onions and blue cheese make for a deliciously indulgent sandwich that’s perfect for a satisfying lunch or dinner. The rich flavors of caramelized onions and creamy stilton pair beautifully with tender sirloin or rump steak. This recipe is simple to prepare and packed with bold taste.

Two open-faced sandwiches sit on a worn blue wooden board placed over a red and white striped cloth on a white marbled surface. Each sandwich has a base of toasted bread with a golden crust and airy texture. On the first sandwich, there are thick slices of pink, medium-rare steak layered on the bread, topped with green arugula leaves and crumbled blue cheese. The second sandwich also has steak slices, caramelized dark brown onions, blue cheese crumbles, and scattered arugula. To the left, there is a plain toasted bread slice with a shiny drizzle of olive oil, slightly charred. A serrated knife with a wooden handle lies on the board between the sandwiches and a white bowl filled with rich, dark caramelized onions. At the top, a white bowl of fresh green arugula is partially visible, flanked by two glasses containing amber sparkling drinks with foam bubbles. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

2 tbsp unsalted butter
1 red onion, thinly sliced
2 tbsp Worcestershire sauce
½ tbsp light brown soft sugar
40g stilton, crumbled
2 tbsp mayonnaise
1 large sirloin or rump steak (about 350g)
4 slices sourdough bread
Handful of rocket, to serve

Instructions

Step 1: Melt the butter in a frying pan over medium heat. Add the sliced red onion with a pinch of salt and cook for 15 minutes, stirring occasionally, until the onion is golden brown.
Step 2: Stir in the Worcestershire sauce and light brown sugar, then cook for an additional 5 minutes until the onions are sticky and caramelised. Remove from heat and set aside.
Step 3: In a small bowl, combine the crumbled stilton and mayonnaise. Season with freshly ground black pepper and mix well. Set this blue cheese mixture aside.
Step 4: Season the steak on both sides with salt and pepper. Heat a griddle pan over high heat, then cook the steak for 2-3 minutes per side (2 minutes for rare, 3 minutes for medium). Remove the steak, cover with foil, and allow it to rest for 10 minutes.
Step 5: Slice the rested steak thinly. Toast the sourdough slices until golden and crisp.
Step 6: Spread each slice of toasted sourdough with the blue cheese mixture. Top with sliced steak, sticky onions, and a handful of rocket leaves. Finish with a grind of black pepper and serve two open-faced sandwiches per person.

Tips & Variations

For extra depth, add a splash of balsamic vinegar to the onions as they caramelise.
Swap stilton for gorgonzola or another blue cheese if preferred.
Use ciabatta or a crusty baguette in place of sourdough for a different texture.
For a milder onion flavor, cook onions at a lower heat for a longer time to fully caramelise without burning.

Storage

These steak sarnies are best eaten fresh to enjoy the contrast of textures and flavors. If you need to store leftovers, keep components separately: refrigerate the steak slices and onions in airtight containers for up to 2 days. Reheat the steak gently to avoid toughness, then assemble the sandwich freshly before serving.

How to Serve

The image shows two slices of toasted rustic bread with a light golden crust placed on a white rectangular cutting board with a worn blue paint look. Each slice is layered with thin pieces of medium-rare steak, topped with dark caramelized onions, small bits of creamy blue cheese, and fresh green arugula leaves. Next to the two open-faced sandwiches is a third slice of toasted bread with a glossy spread of olive oil on top. A serrated knife with a wooden handle lies beside the sandwiches, and a small white bowl filled with caramelized onions sits on the right side of the board. Surrounding the board is a red and white striped cloth on a white marbled textured surface. There are two glasses of amber-colored beer and a blue bowl filled with fresh arugula leaves visible in the frame. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use a different cut of steak?

Yes, other tender cuts like ribeye or fillet work well. Just adjust cooking time based on thickness and personal preference for doneness.

How do I make the onions sticky without burning them?

Cook the onions slowly over medium to medium-low heat, stirring regularly. Adding sugar and Worcestershire sauce helps create that sticky, caramelised texture without burning.