Place pasta, tomatoes, onion, and garlic in a large stock pot. Pour in vegetable broth. Sprinkle on top the pepper flakes and oregano. Drizzle top with oil.
Cover pot and bring to a boil. Reduce to a low simmer and keep covered and cook for about 10 minutes, stirring every 2 minutes or so. Cook until almost all liquid has evaporated - I left about an inch of liquid in the bottom of the pot - but you can reduce as desired .
Season to taste with salt and pepper. Add basil leaves and stir pasta several times to distribute the liquid in the bottom of the pot evenly throughout the pasta as you are serving. Serve garnished with Parmesan cheese.
Find any recipe, add your own, make grocery lists easily from recipes. Enter any 3 ingredients and BigOven will tell you what you can make. It's free! (4.5/5 stars)