Mix maida, butter, sugar, and salt and mix it with fingertips until crumbly.
Add the cold water and bring the dough together. Knead to a dough and refrigerate for 30 mins.
Finely chop onion, green chilies and spinach. Heat butter and add onion and green chilies.
When the onions turn colour, add the spinach and salt.
The spinach will wilt. Saute it, becomes dry.
Pre-heat oven to 200C.
Divide the dough into equal balls, dust, and roll out into thin discs.
Grease the molds, and transfer the discs and press them firmly on the pie dish.
Remove excess dough.
Prick the lined dough with a fork.
Bake the pies for 25 mins or till the top gets brown.
For the Paneer sauce, pulse the milk and paneer together along with Red chili flakes.