Ingredients
- 3 large leeks
- 3 tbsp good-quality extra-virgin olive oil
- 2 tbsp grain mustard
- small bunch chives, finely chopped
- 18 slices Carmarthen ham or any good quality air-dried ham
- 1 Perl Wen (a Welsh cow's milk cheese) or 2 balls buffalo mozzarella, drained and each cut into 6 wedges
- toasted sourdough bread, to serve, optional