01 - Melt 2 tbsp butter in a large skillet or saucepan over medium heat. Add chopped onions and cook until translucent, approximately 2 minutes.
02 - Stir in minced garlic and cook for 30 seconds until fragrant. Add sliced mushrooms and sauté until softened and golden brown, about 5–7 minutes.
03 - Add rinsed rice to the skillet and cook, stirring constantly, for 1 minute to lightly toast the grains.
04 - Pour in vegetable broth and add fresh thyme leaves. Stir thoroughly to combine all ingredients.
05 - Bring mixture to a gentle simmer. Reduce heat to low, cover tightly, and cook for 15–18 minutes until rice is tender and liquid is fully absorbed.
06 - Remove from heat. Stir in remaining 1 tbsp butter and fluff rice gently with a fork. Season generously with salt and black pepper to taste.
07 - Top with additional fresh thyme, chopped parsley, and grated Parmesan cheese if desired. Serve immediately while warm.