Pre-heat the oven to 350 degrees F. Put the empty popover pans in the oven to pre-heat as this is the secret to fantastic popovers! Gently warm the milk in a saucepan over low heat, and set aside. In a standing mixer or with a hand held mixer, whisk the eggs until frothy and slowly whisk in the warm milk, a little at a time so you don’t "cook" the eggs. In a separate bowl sift the flour with the salt. Slowly add the dry mixture to the egg/milk mixture and gently combine until almost completely smooth and similar in texture to pancake batter.