Leek and Ham Empanadas recipes

Name: Leek and Ham Empanadas recipes
Ingredients: 2 tablespoons butter; 2 cups packed thinly sliced leeks, white and light green parts; 1/2 cup grated Parmesan cheese; 1/2 cup grated Swiss or Gruyere cheese; 2 cups loosely packed fresh, coarsely chopped baby spinach; 1/4 cup chopped Italian parsley; 1/2 cup sour cream; 4 ounces smoked ham in 1/4-inch dice; salt; freshly ground black pepper; 3 sheets puff pastry dough, thawed (two packages); flour; 1 egg beaten with 2 tablespoons of milk; sea salt