2 medium heads cauliflower, cut into florets
1/4 cup minced white onion
1/4 cup grated Parmesan cheese
1/4 cup finely ground breadcrumbs
1 large egg
Freshly ground black pepper
Ketchup, for serving, optional
The onion should to be cut small enough so that it's not too chunky and can be easily mixed into the cauliflower mixture.