chopped parsley, to serve (optional)
salt and freshly ground pepper
snipped chives or spring onion, to serve (optional)
2-3 medium sweet potatoes
salt and freshly ground black pepper
2 tbsp olive oil
2 tsp olive oil
butter, to serve
50²µ/1ΒΎ΄Η³ϊ butter
75-100ml/2Β½-3Β½fl oz milk