How To Make Greek Lamb Kleftiko

Ingredients

• 1-1.2 kg/ 35 oz. leg of lamb, boneless (approx. 2kg/ 70 oz. bone in)
• 2 small red onions
• 2-3 bell peppers (green, red, orange)
• 4 cloves of garlic (2 sliced and 2 whole)
• 2 tbsps mustard
• juice of half a lemon
• 1 tbsp dried oregano
• 1/2 a cup olive oil
• 1/2 a cup dry white wine
• 200g kefalotyri or Graviera or any had yellow cheese, cut into cubes (7 oz.)
• 5 medium sized potatoes
• 1/2 ripe tomato, sliced
• salt
• freshly ground pepper
• parchment paper
• kitchen string