Preheat the oven to 190°C.
Blanch the cauliflower in boiling water or steam over boiling water for a couple of minutes. It should only be half-cooked.
Rinse the cauliflower with cold water, then put them in a food processor and pulse for a few seconds.
Add the stems of the mushrooms and the chopped spring onions. Season with salt pepper and pulse again, until you get a coarse texture.
Add the grated cheese, minced garlic and the spices. You can add some chickpea or corn flour if you like, but it’s not necessary.
Lightly oil a baking sheet. Fill the mushroom with the cauliflower cheese pushing the mixture down with a spoon.
Bake for about 15 minutes or until golden.
Serve warm with a pinch of paprika.