In a sauce pan, boil water and add pasta to it. Cook al dente or as per packet instructions. Strain it using a sieve and keep it aside.
Heat oil in a pan and add onions and garlic to it with little salt. Cook for 5 mins.
Add sweet potato to it and cook for 7-8 mins or until they are soft
Add tomatoes, bell peppers with little salt, continue to cook until they are soft.
Add water to the pot
Add paprika to the mix, continue to cook. Turn off the heat once the sweet potatoes have completely cooked.
Add nutritional yeast flakes and mix them in the pot
Once the mixture has cooked, move the contents to a blender and blend until smooth
Add a sieve on top of the pot, filter the pasta sauce, add little water if required
Start cooking the pasta sauce ,allow it to come to boil
Add the cooked pasta, mix slowly, allow for cook for few minutes. Turn off the heat.
Serve warm