Whisk the eggs, milk, ½ teaspoon freshly ground black pepper and ¼ teaspoon salt in a large bowl to blend well. Roughly chop the ham and grate the Parmesan. Stir them into the mix along with the parsley.
Spray 2 mini-cake (mini muffin) tins with 24 cups with non-stick spray or grease lightly with butter. Fill the cups almost to the top with the the egg mixture and bake in a preheated moderately hot oven (Mk 5 - 375ºF - 190ºC) until the egg mixture puffs and is just set in the centre (about 8 to 10 minutes). Using a rubber spatula, loosen the frittatas from the muffin cups and slide them onto a platter. Serve immediately with a side salad or as part of a finger buffet.