Begin by warming the vegetable broth in a medium saucepan over low heat. This will keep it hot and ready to use during the cooking process.
In a large skillet, heat the olive oil over medium heat. Add the finely chopped onion and sauté, stirring frequently, until softened and translucent, approximately 3-4 minutes.
Next, add the minced garlic and sliced mushrooms to the skillet. Cook for an additional 5-7 minutes, stirring occasionally, until the mushrooms are tender and start to develop a golden-brown color.
Incorporate the orzo pasta into the skillet with the mushroom mixture. Stir well to combine and allow the orzo to toast lightly for about 2-3 minutes, enhancing its flavor.
Gradually add the warm vegetable broth one ladle at a time, stirring continuously as you go. Wait for the orzo to absorb most of the liquid before adding more. This process should take about 15-20 minutes, resulting in a creamy consistency.
Once the orzo is al dente and creamy, reduce the heat to low. Gently fold in the heavy cream, grated Parmesan cheese, dried thyme, and season with salt and pepper. Stir until the mixture is well combined and heated through, ensuring the cheese melts beautifully.
Taste and adjust the seasoning if needed, then remove from heat.
Notes
Serve in shallow bowls and garnish with parsley and extra Parmesan.