Prepare the oats and vegetables.
Heat olive oil in a pan and sauté onion and garlic.
Add mushrooms and carrots, and stir-fry.
Add oats and stir-fry together, then pour in low-sodium vegetable broth.
Simmer over medium-low heat while stirring.
When the oats are tender, season with salt and pepper.
Add Parmesan cheese at the end and mix well.
Serve in a bowl and garnish with parsley.