Ingredients:
25 gms butter
1 large leek, finely chopped
175 gms breadcrumbs (about 3 slices)
2 tbsps thyme, or mixed herbs
2 eggs, 1 large, 1 small
150 gms Caerphilly cheese * or similar, crumbly white cheese
2 tsps mustard (either dried or prepared)
Pinch of salt and pepper
25 gms all purpose...