If using a Thermomix to make these, preheat your oven to 200℃/395℉ (fan forced).
Grate the cheese, 5 seconds, speed 6. Set aside three quarters of it in a large mixing bowl. The other quarter in a small bowl.
Grate the red onion, 2 seconds, speed 6. Add to the mixing bowl.
Grate the zucchini, 5 seconds, speed 4. Add to the mixing bowl.
Add the corn, half the bacon (the other half can be set aside with the cheese) and rosemary.
Place the bowl on the Thermomix and zero out the scales.
Add the flour, salt, pepper, baking powder and fold it all together.
Add the eggs and milk to the Thermomix and beat, 5 seconds, speed 4.
Fold this through the other ingredients until just combined.
Divide between ten patty cases, top with the remaining cheese and bacon and bake for 15 minutes or until risen and golden brown.
Allow to cool on a wire rack.