Philly Cheesesteak Sandwich Recipe | Everdure by Heston

Ingredients

• 80g unsalted butter, room temperature
• 40g creamed horseradish
• pinch fine salt
• 600g sirloin steak
• 2 tsp tarragon
• 2 tsp mustard powder
• 1 lemon, zest only
• 2 tsp ground black pepper
• 2 torpedo rolls
• 40g reserved horseradish butter
• 8 button mushrooms
• 1 lemon, zested
• olive oil
• fine salt and freshly ground black pepper
• 100g reserved sliced sirloin
• 50g white onions, peeled and thinly sliced
• 50g red pepper, thinly sliced
• 2 slices Jarlsberg cheese