Preheat oven to 375 F degrees.
Thoroughly spray or brush olive oil in a 12-muffin pan or in individual tart tins; you don't want these to stick to the pan.
In a large mixing bowl, gently whisk the eggs; blend in all remaining ingredients.
Pour the egg mixture into each olive oil-prepared muffin cup up to about ¼" below the top.
Sprinkle more grated cheese on the tops of each mini frittata.
Bake for 20 minutes until the tops of the frittata begin to puff up and a golden brown color is achieved; the frittate will settle down while cooling.
Run a knife around the edges of each frittata to loosen them from the muffin cups.
With a rubber spatula, gently remove each mini frittata from the pan and place on a warm platter.
Garnish with sprigs of Italian parsley.
Serve immediately.