500g (2 large bunches) fresh spinach, washed, stems removed
900g kestrel potatoes, peeled
40g butter, unsalted
3 egg yolks
Salt, to taste
30g olive oil
2 garlic cloves, thinly sliced
30g anchovies
½ tsp ground toasted cumin
150g Greek feta, crumbled
3 filo pastry sheets
60g unsalted butter, melted
20g nigella seeds
Butter, melted