Place frozen cauliflower in a microwave safe dish, cover with plastic wrap.

Microwave on high for 12-15 minutes. It should be VERY soft and easy to mash.

Once cauliflower is soft and mashable, drain well and add to a food processor, along the shredded cheese, sour cream, and butter.

Blitz until very smooth, then season with salt and pepper, to taste. Set aside.

Preheat oven to 400 F, line a baking sheet or pizza pan with parchment paper.

Measure mozzarella cheese into a microwave-safe bowl. Heat - 30-45 seconds at a time - until cheese has melted.

Measure remaining ingredients into a food processor - except the eggs - blitz to combine. Add the eggs, blitz once more to fully combine.

Add melted cheese to the food processor, pulse until well combined - you don’t want to see any sections of unmixed cheese.

Use wet hands to form dough into a 12" round on the prepared pan - aim for it to be a little thicker around the edges.

Prick all over with a fork, then bake in the preheated oven for 12 minutes.

Cook bacon and onions together in a large frying pan. When bacon is fully cooked and onions are translucent, remove from heat, drain off the fat.

Stir your cheesy cauliflower mixture. If it’s too thick to spread easily, feel free to add a little milk. Spread over prepared pizza crust.

Scatter bacon and onion mixture and sauerkraut (if using) across the pizza crust. Top with shredded cheese.

Bake for another 12 minutes, until cheese is golden and bubbly.

Garnish with sour cream and green onion slices, serve immediately.