Wash the pumpkin, remove the seeds, and cut into cubes. Quarter the shallot and leave the garlic cloves whole. Toss everything in a baking dish with olive oil and spices.
Roast in the preheated oven for 25 minutes, flipping once halfway through.
Add the roasted vegetables to a blender along with cottage cheese, water, and tomato paste. Blend until smooth and creamy.
Meanwhile, cook the rigatoni in a pot of salted water until al dente. Drain over a sieve.
Combine the pasta and pumpkin sauce. 👉 Important: Don’t reheat the sauce once mixed, as cottage cheese may curdle. This doesn’t affect the taste but won’t look as smooth.
Notes
Leftovers: Store in an airtight container in the fridge for up to 3 days. Reheat gently in the microwave or in a pan with a splash of water.