Set a large pot of water to a boil and salt it. In a bowl, combine flour with pepper and a large pinch of salt. Lightly beat together eggs and milk, and add to flour, stirring. If necessary, add a little more milk until mixture has the consistency of pancake batter. Scoop a tablespoon or so of batter, and drop it into water; small pieces may break off, but batter should remain largely intact and form a disk. Repeat, using about one-third to one-fourth the batter, depending on the size of the pot. When spaetzle rise to top a couple of minutes later (you may have to loosen them from the bottom, but they will pop right up), cook another minute or so, then remove with a slotted spoon into a bowl of ice water. Repeat until all the batter is used up. Drain spaetzle; at this point you can toss them with a bit of oil and refrigerate, covered, for up to a day. Heat butter or oil in a large skillet, preferably nonstick, over medium-high heat. When it's hot, add spaetzle a few at a time, and quickly brown on both sides. Serve hot, garnished with parsley or chives.