30 ml (2 tbsp) olive oil
5 ml (1 tsp) mustard seeds
1 large potato, cubed
2 slices of serrano ham, shredded
1 onion, thinly sliced
2 garlic cloves, thinly sliced
1 red chilli, seeded and sliced
115 g (4 oz) skinless, boneless cod, cubed
120 ml (4 fl oz) 1/2 cup vegetable stock
50 g (2 oz) 1/2 Cup grated tasty cheese, such as Manchego or Cheddar
salt and freshly ground black pepper