Boil your pasta. Then In a medium-sized pot, simmer the cashew milk, potato, onion,and garlic on medium-low heat for 15-20 minutes, or until the potato pieces have softened. Then add pumpkin, salt and pepper and mix them in with potatoes
Transfer mixture to a blender for a quick blend until smooth and mix cooked pasta and mixture in a large oven-safe bowl and mix until noodles are coated.
In a mostly sealed plastic bag, smash the cornflakes until they are in tiny pieces. Add the thawed butter to the bag and mix well and spread Corn Flake mixture on top of the noodles in the baking dish.
Bake mac and cheese in the oven at 350 degrees for thirty minutes.