Spinach, Ricotta & Feta Quiche (Spanakopita Tart)

plain flour

salt

(1/3 + 1/4 cups) cold, unsalted butter (cubed)

finely grated parmesan or grana padano cheese

egg (separated)

about 2tbsp ice water

frozen spinach

ricotta cheese

large eggs (beaten)

+ 1 tbsp) double (heavy) cream

spring onions ((scallions))

small bunch finely chopped parsley (about 1/2 a 25g packet)

small bunch finely chopped dill (about 1/2 a 25g packet)

garlic cloves (peeled and crushed)

salt and pepper

feta cheese