Savory Pies- Alsatian Potato Pie - SippitySup

Name: Savory Pies- Alsatian Potato Pie - SippitySup
Cuisine: European
Ingredients: 1 1/2 lb yukon gold potatoes, peeled and cut into 1/4‑inch-thick rounds; 1 pn coarse salt, plus more as needed; 5 clv garlic, crushed with the flat side of a large knife; 1/2 t freshly grated nutmeg; 1 pn freshly ground black pepper; 2 T unsalted butter; 1 medium leek, white and light-green parts only, halved lengthwise, thinly sliced crosswise, and washed well; 1/4 c chopped fresh flat-leaf parsley; 1 large egg yolk; 1 (14 ounces) frozen puff pastry, thawed; all purpose flour, for dusting work surface; 1 1/2 c grated comte or gruyere cheese