In a large skillet or saucepan, sauté the chopped onion and carrots on low heat until onions are translucent and carrots are cooked through. Add a tablespoon of water or broth to prevent sticking, as needed.
Stir in the tomatoes, herbs, nutritional yeast, and salt (if using). Simmer for another 5 minutes or so.
Adjust seasonings to taste.
Ladle the sauce over the pasta, zoodles, or spaghetti squash and serve.
Notes
- Diced carrots lend a natural sweetness to this otherwise acidic marinara.