In a frying pan (just large enough to ensure sauce covers the bottom), heat sauce over low heat. Bring to a mild simmer.
Using a spoon, make a well in the sauce, for each egg you will be cooking.
One at a time, break an egg into a small dish and slide it into the well created in the sauce. Repeat with remaining eggs.
Sprinkle with salt, pepper and parmesan cheese. Cover with a lid and cook for 5 minutes for medium-firm yolks. Cook less or more depending on desired firmness.
Slide cooked eggs out of the pan and on top of a toasted ciabatta roll. I prefer mine buttered first.