1. Preheat the oven to 180° C.
2. In a lidded oven dish, heat the oil and fry the onion, until starting to soften. Add the garlic, cook for another 2–3 minutes, then add the mushrooms.
3. Add the risotto rice and cook until the grains appear glassy. Stir in the wine and vegetable stock /water. Add salt and pepper. Place the lid on the dish and bake for 15 minutes, stirring halfway through.
4. Top with a final layer of mozzarella and bake until it melts and becomes golden.
5. Sprinkle with chopped basil/parsley.