2 garlic cloves, crushed
2 onions, sliced
2 tbsp chopped fresh flatleaf parsley
3 Maris Piper potatoes, peeled and diced
1 tbsp Dijon mustard
onion relish, chutney or ketchup, to serve
plain flour, for dusting
salt and freshly ground black pepper
Β½ tsp cayenne pepper
1 tbsp olive oil
25g/1oz butter
150g/5Β½oz mature cheddar, grated
1 free-range egg, beaten, for glazing
500g/1lb 2oz ready-made puff pastry