2 cups cake flour (not self-rising)
1/2 cup all-purpose flour plus additional for kneading
4 large egg yolks
3 tablespoons extra-virgin olive oil
1 teaspoon salt
1/2 cup water

For filling

2 tablespoons unsalted butter
1 1/2 teaspoons finely chopped garlic
3/4 teaspoon salt
3/4 teaspoon black pepper
1 lb arugula, trimmed
1 teaspoon finely grated fresh lemon zest (see Tips)
1/2 cup soft mild goat cheese (4 1/2 oz)
1/2 cup ricotta (preferably fresh; 4 1/2 oz)

For sauce

1/2 stick (1/4 cup) unsalted butter
1/3 cup pine nuts (1 1/2 oz)
1 tablespoon finely chopped garlic
1/2 teaspoon black pepper
1/4 teaspoon salt
2 teaspoons fresh lemon juice
1/4 cup extra-virgin olive oil
1/2 cup chopped arugula