3 green fontina pie Recipes

mustard greens*, thick ribs removed, chopped, extra-virgin olive oil, kosher salt, pepper, melted unsalted butter, sheets thawed frozen filo dough, cut into 7 1/2-in. squares (to make 12), fontina cheese (preferably italian), shredded

pie dough, leek (about 3 medium, white and pale green parts only), unsalted butter, sliced smoked ham, gruyere, coarsely grated (1 cup), italian fontina, coarsely grated (1 cup), whole milk mozzarella, coarsely grated (1 cup), eggs, freshly grated nutmeg, black pepper, creme fraiche (from two 8-oz containers)