Mom's Spinach-Ricotta Pie

INGREDIENTS

3 10 ounce packages

frozen leaf spinach (or 2 pounds fresh), thawed & drained

1 1/2 lb

ricotta

small yellow onion, finely chopped

2 cloves

garlic, finely chopped

2 tbsp

chopped fresh parsley

7 tbsp

salted butter (if using fresh spinach, use 4 tablespoons butter and 3 tablespoons olive oil)

1/4 tsp

salt

black pepper,

1 1/4 cups

Pecorino Romano, grated

eggs, beaten

1 tbsp

Parmesan, to sprinkle on top

3 cups

all-purpose flour

1 cup

plus 1 tablespoon salted butter, softened & cut into pieces

5 tbsp

very cold water

1 tbsp

apple cider vinegar (or white)

egg white, beaten