Put your potatoes into a pan of salted boiling water and cook for 15
minutes. Meanwhile blanch your asparagus in a separate pan of salted
boiling water for 4 minutes, and drain in a colander.
Preheat the oven to 190°C/375°F/gas 5. Get an ovenproof dish – I’ve
used many different shapes and sizes. Layer the sheets of filo pastry
in the dish, brushing them with melted butter as you go and letting
about 2.5cm hang over the edge. You want to get the pastry about five
layers thick. Put a clean, damp tea towel over the top and put to one
side.
When the potatoes are done, mash them with the cheeses. In a separate
bowl, mix together the eggs and cream and stir in your cheesy mashed
potato. Grate in the nutmeg, season well with pepper and mix together.
Spread the mashed potato over the filo pastry, then bring up the sides
of the filo and scrunch them together to form a rim. Take your blanched
asparagus and line them up across the filling, making sure you cover it
all. Brush all over with the remaining melted butter and pop into the
preheated oven for around 20 minutes, or until golden and crisp. Allow
to rest for 10 minutes. Serve just as you would a quiche for a quick
lunch or supper, with a salad.