Cook the pasta according to package directions.
Add the cooked butternut squash, cottage cheese, milk, cornstarch, and seasonings to a blender. Blend until completely smooth (don’t add the cheddar yet).
Pour the sauce into a pot after draining the pasta. Stir in the shredded cheddar and heat over medium-low, stirring often until melted, creamy, and lightly simmering. Reduce heat to low.
Add the cooked pasta back into the pot and stir until fully coated. If it’s too thick, add a splash of milk until creamy. Adjust seasoning if needed and serve warm.
