Steps
1. In a saucepan, heat the vegetable broth and keep it warm on low heat.
2. In a separate pan, heat olive oil and butter over medium heat. Add chopped onions and sauté until translucent.
3. Add minced garlic and sliced mushrooms; cook until mushrooms are tender and golden brown.
4. Stir in the Arborio rice and cook for 1-2 minutes, until slightly toasted.
5. Begin adding the warm vegetable broth, one ladle at a time, stirring frequently until absorbed before adding more.
6. Continue this process for about 18-20 minutes, or until the rice is al dente and creamy.
7. Stir in the grated Parmesan cheese, and season with salt and pepper to taste.
8. Garnish with fresh parsley before serving.