Adjust ingredient amounts accordingly based on the number of portions you plan to make.
Slice a thin strip of zucchini (a mandoline is very helpful to get even thin strips).
Put the flour into a mixing bowl, and season the flour with salt and pepper.
Beat an egg in another mixing bowl.
Dip the zucchini slice into the seasoned flour and then the egg.
Gently lower into a sauté pan with about ¼ inch of corn oil heated, so the zucchini sizzles nicely when it touches the oil.
Cook for approximately 1 minute and turn gently to cook on the remaining side.
Set aside while you finish additional slices.
Mix the ricotta, salt, pepper, and parsley in a small bowl. Spoon onto one end of the zucchini and roll. Place onto a baking sheet.
Top with some tomato sauce.
These can be made ahead and stored in the refrigerator at this point. Bring them out of the refrigerator about 30 minutes before baking.
Bake in the oven at 350 for 15 to 20 minutes until nice and hot.
Transfer to warm plates, and drizzle with olive oil and some reduced balsamic for a dramatic presentation.
Serve immediately.