Slow cooker massaman curry

Name: Slow cooker massaman curry
Ingredients: 500g/1lb 2oz new potatoes, halved; 800g/1lb 12oz boned lamb shoulder or beef shin, cut into matchbox-size pieces; 3 tbsp massaman curry paste; Small bunch fresh coriander, stalks finely chopped; 5cm/2in piece fresh root ginger, finely grated; 400ml/14fl oz can coconut milk; 1 tsp light muscovado sugar; 1 lime, zest and juice; 1 tbsp fish sauce, plus extra to taste; 6 freeze-dried kaffir lime leaves (optional); Handful roasted unsalted peanuts, roughly chopped, to serve