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Sliders with Blue Cheese & Red Onion-Strawberry Relish

Sliders with Blue Cheese & Red Onion-Strawberry Relish

6 servings

As a bite-sized appetizer or full-blown main course, our recipe for Burger Blue sliders with red onion-strawberry relish make up for their smaller size in even bigger flavor. Cushioned between a set of toasted burger buns, spiced beef and fresh arugula share a garnish of homemade aioli, caramelised relish and rich blue cheese.

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Red onion relish:

  • 1⅗ ounces butter, unsalted
  • 3 red onions, halved and sliced
  • 12 strawberries, chopped
  • 2⅘ ounces sugar
  • 0,7 ounce red wine vinegar
  • salt to taste
  • pepper to taste


  • 1⅔ pounds meat mince
  • 1 tsp salt
  • ½ tsp pepper
  • 1 tbsp fresh thyme, finely chopped
  • 1 tbsp butter, unsalted
  • 1 tbsp olive oil


  • homemade aioli
  • fresh rocket
  • fresh strawberries
  • sliced blue cheese



1. Melt the butter in a large, deep pan over medium heat. When the butter foams up, add the sliced red onions and saute until tender and transparent.

2. Chop the strawberries and combine the sugar with the vinegar and red wine. Add the chopped strawberries and the sugar-vinegar mixture to the red onions. Turn up the heat and continue to cook until the liquid has reduced and evaporated.

3. Add salt, pepper and fresh thyme to the ground meat and mix well. Shape into sliders (approx. 4 oz each). Melt the butter and oil in a pan over medium heat and cook the sliders for 2 min. on each side.

4. Spread the homemade aioli on a slider or burger bun and top with fresh arugula, which gives the burger a peppery flavor.

5. Top with Castello® Burger Blue, either cold or melted! Creamy and delicious :)

Serving Suggestion

Serving Suggestion

Serve with chips or a fresh summer salad.