Stuffed Lamb Saddle

Name: Stuffed Lamb Saddle
Ingredients: 1 kg boned saddle of lamb, ask your butcher to do this; 1 tbsp. olive oil; Few thyme sprigs; 25 g butter; 1 small onion, finely chopped; 2 garlic cloves, crushed; 75 g fresh white breadcrumbs; 1/2 tbsp. wholegrain mustard; 100 g goat’s cheese round, crumbled; 1 medium egg yolk; 1 tbsp. thyme leaves; 2 tbsp. capers, rinsed; 25 g pack mint, leaves picked; 25 g pack parsley; 2 tbsp. red wine vinegar; 1/2 tbsp. Dijon mustard; 2 tbsp. olive oil; Juice 1/2 lemon; Kitchen string