01 -
Heat olive oil in a large skillet over medium heat. Add finely chopped onion and cook until translucent, about 5-7 minutes.
02 -
Stir in minced garlic and chopped fresh sage. Cook for 1 minute until fragrant, taking care not to burn the garlic.
03 -
Pour pumpkin puree into the skillet and combine thoroughly with the aromatics. Cook for 2-3 minutes, stirring occasionally.
04 -
Add heavy cream and grated Parmesan cheese, stirring until the cheese melts and the sauce becomes smooth.
05 -
Season with salt, freshly ground black pepper, and red pepper flakes if using. Reduce heat to low and simmer gently for 10-15 minutes, stirring occasionally. Add vegetable broth or reserved pasta water if the sauce thickens too much.
06 -
Meanwhile, bring a large pot of salted water to a boil. Cook pasta according to package instructions until al dente. Reserve 1/2 cup of pasta water before draining.
07 -
Add drained pasta to the skillet with the sauce. Toss to coat evenly, adding reserved pasta water one tablespoon at a time if necessary to achieve desired consistency.
08 -
Stir in half of the crumbled feta cheese. Melt butter in a small pan and drizzle over the pasta for added richness.
09 -
Serve immediately, garnished with remaining feta cheese and toasted pumpkin seeds.