In a large bowl, mix the flour and salt, then mix in the water, vinegar, and egg yolks and knead until a dough is formed. Wrap in plastic wrap and let sit for 30 minutes.
Roll the dough out on a lightly floured work surface until it is a 10 by 15-inch rectangle. Smear one third of the soft lard over the dough using a rubber spatula. Fold the dough into thirds a