Italian Grandma's Cake - Torta della Nonna by Cooking with Manuela

Ingredients: to make an 11 inches (28 cm) tart
For the dough (pasta frolla):
3 cups (450 gr) of all-purpose flour
3/4 cup (150 gr) of sugar
zest of one lemon, grated
one pinch of salt
6 oz (170 gr) of unsalted butter
2 eggs
1 egg yolk
1 teaspoon of vanilla extract
For the custard pastry cream (crema pasticcera):
4 cups (1 liter) of milk
half lemon (peel, in one piece)
6 egg yolks
1/2 cup (75 gr) of all-purpose flour
1 cup (200 gr) of sugar
1 teaspoon of vanilla extract
For the top:
4 oz (115 gr) of pine nuts
2 tablespoons of milk
powdered sugar to decorate (optional)