Heat a large pot on medium heat. Once warm, add the oil, onion, garlic, and cook for 2-3 minutes or until fragrant.
Add the salt, pasta, water, yellow squash, zucchini, mushrooms, marinara sauce, oregano, basil, and mix until combined. Bring to a simmer and cook until the pasta is cooked completely, around 10-13 minutes, occasionally stirring, about every couple minutes. Based on what type of pasta you used will depend on the cooking time.
Lastly, mix in the fresh spinach and nutritional yeast with the pasta.
Taste your pasta and add additional seasoning (salt, pepper or oregano). If your pasta is too thick, add additional pasta sauce. Divide pasta into bowls and garnish with your favorite toppings.
Leftovers will last in the refrigerator in an airtight container for 2-3 days.
