Fill a large pot with 5 cups water. Add in pasta, pumpkin puree, olive oil, garlic and salt.
Cook it over medium medium high heat until it boils ( for 3-4 minutes), stirring a few times. Stir constantly after it boils so that it doesn’t stick. Continue cooking until there is very little juice at the bottom of the pot, for 8 minutes.
Quickly add the mozzarella and stir. Remove it from heat, place cheddar slices on the top, sprinkle parsley and cover the pot. Let it wait for 5 minutes until the cheddar cheese melts.