Make sure your vegetable broth, pasta and sundried tomatoes are vegan. Check the labels of these ingredients to confirm. While most dry pastas are vegan, many fresh pastas are not, so read the ingredients list carefully. Feel free to make a non-vegan version by subbing in an equal amount of chicken broth for the vegetable broth and replacing the nutritional yeast with 1/2 cup (40 grams) finely grated Parmigiano-Reggiano, plus a little more for serving.