Slow roast lamb shoulder and lamb fat potatoes

Name: Slow roast lamb shoulder and lamb fat potatoes
Yield: Serves 6
Ingredients: 1 garlic bulb; a pinch of salt; 1.5 kg Maris Piper potatoes; 1.5 kg lamb shoulder (bone in); 1 tbsp olive oil; 1 tsp lemon juice; 40 g wild leeks; 4 bay leaves; 10 g thyme; 1 tbsp fennel seeds; 1 onion, roughly chopped; salt; 1 tbsp cumin seeds; 1 tbsp fine salt; 200 g yoghurt; 50 g black garlic paste; 1 tbsp sea salt; 4 carrots, peeled and roughly chopped; 3 celery sticks, roughly chopped; 40 g wild garlic; 1 tsp sunflower oil; 2 tbsp sunflower oil; 150 g sugar snaps; 150 g green beans, trimmed