Preheat an oven to 220 degrees C. Line a large baking tray with baking paper.
Mix together the minced beef, onion, bread crumbs, parmesan cheese, eggs, garlic, oregano, basil, thyme, Worcestershire sauce, salt and pepper in a large bowl until just combined. Divide the mixture into 4 equal portions then roll each of those portions into 4 balls. Arrange the rissoles on the prepared baking tray.
Bake in the preheated oven until no longer pink in the centre, 15 to 20 minutes.