Add the eggs and milk mixture, and mix on medium speed until the dough comes together (2-3 minutes). Add salt. If the dough hasn’t come together, add a few drops of water or milk. Occasionally scrap the sides of the bowl with a rubber spatula to ensure all ingredients are incorporated. Continue mixing for about 10 minutes on medium speed until the dough is completely smooth, elastic, and shiny, and pulls away from the sides of the bowl.