Roast beef sandwich with deep-fried onions and creamy horseradish sauce

Ingredients:

Creamy Horseradish Sauce

• 0.5 cup mayonnaise
• 0.5 cup sour cream
• 1/4 cup horseradish
• 2 teaspoons of honey
• 2 teaspoons Dijon mustard

Crispy onions

• 2 cups of sour milk or kefir
• 2 onions, thinly sliced ​​lengthwise
• Vegetable oil for frying
• 2 cups of flour
• 2 tsp cayenne pepper
• 2 tsp paprika

Sandwiches

• 8 fresh onion buns, halved, brushed with butter and toasted until golden brown
• 4 thick slices sharp cheddar
• 900 g high-quality roast beef, medium rare, thinly sliced

Preparation:

1. Horseradish sauce:
   
   In a bowl, combine mayonnaise, sour cream, horseradish, honey, and Dijon mustard. Season with salt and pepper.
2. In a medium sized cauldron, heat 7 cm of vegetable oil to 175°C. Pour the sour milk over the onions and let them steep for about 30 minutes.
3. Deep-fried onions:
   
   Mix flour, cayenne pepper, paprika, and a little salt and black pepper. Remove the onions from the sour milk and thoroughly coat them in the flour. Fry in batches until golden, 2-3 minutes. Transfer to paper towels to drain excess oil, and season with salt while the onions are hot.
4. Sandwiches:
   
   Place a slice of cheddar on toasted onion buns, pile the roast beef on top, add as many crispy onions as will fit in the sandwich, then spread a generous amount of horseradish sauce on the top half of the bun and sandwich.