Ingredients

• 3 pounds ground lamb (preferably from shoulder, and preferably freshly ground at home)
  
• 1 small fennel bulb (about 6oz)
  
• 1 small cucumber (about 6oz)
  
• ¹/₂ small red onion (about 1.5 oz), cut into paper-thin ribs
  
• ¹/₄ teaspoon cumin powder
  
• 3-4 tablespoons Greek yogurt
  
• 3 tablespoons ketchup
  
• 3 tablespoons pomegranate syrup or pomegranate molasses
  
• 1 tablespoon light honey
  
• ¹/₄ teaspoon Dijon mustard
  
• ¹/₄ teaspoon Honey Dijon mustard
  
• 6 ciabatta rolls, sliced in half
  
• Salt and freshly ground pepper