In a non stick pan or baking dish (8-9 inch / 22 cm) add the olive oil and chopped pancetta and zucchini cook until golden brown. Stirring often so that they don't burn or stick to the pan.
While the zucchini and pancetta are sauteeing, in a medium bowl beat together the eggs and parmesan cheese, stir in the parsley and pepper. Then pour the mixture into the pan with the cooked zucchini and pancetta, stir gently to combine.
Place pan in pre-heated oven and bake for about 20 minutes. The Frittata is done when the eggs are puffed and opaque in colour. It should still wiggle just a tiny bit in the centre (don't worry it will continue to cook even when it's removed from the oven). Let sit 5 minutes then slice and serve. Enjoy!