Clean and slice the mushrooms and onion.
Heat olive oil in a pan and sauté the onion.
When the onion turns translucent, add the mushrooms and sauté together.
Add rice and cook for about 2 minutes.
Pour in white wine, let it simmer, then gradually add warm broth while stirring so the rice cooks thoroughly.
Once the rice is cooked to the right texture, add Parmesan cheese and mix well.
Season with salt and pepper, then plate.