01 -
Heat olive oil in a large skillet or Dutch oven over medium heat. Add finely chopped onion and cook until softened and translucent, about 5 to 7 minutes.
02 -
Stir in minced garlic and chopped sage, cooking for another minute until fragrant, taking care not to burn the garlic.
03 -
Add pumpkin puree to the skillet and combine thoroughly with the onion, garlic, and sage mixture. Cook for 2 to 3 minutes while stirring occasionally.
04 -
Pour in heavy cream and stir to form a smooth sauce. Add grated Parmesan cheese, stirring until melted and fully incorporated.
05 -
Season with salt, freshly ground black pepper, and red pepper flakes if desired. Reduce heat to low and simmer gently for 10 to 15 minutes, stirring occasionally. Thin with vegetable broth or reserved pasta water if the sauce thickens too much.
06 -
While the sauce simmers, bring a large pot of salted water to a boil. Cook pasta according to package instructions until al dente. Reserve ½ cup of pasta water before draining.
07 -
Add drained pasta to the skillet with the pumpkin sauce. Toss to coat evenly, adding reserved pasta water by tablespoons if needed to loosen the sauce.
08 -
Gently fold in half of the crumbled feta cheese into the pasta and sauce mixture.
09 -
Melt butter in a small pan and drizzle over the pasta for added richness. Toss lightly to combine.
10 -
Serve immediately, garnishing each portion with remaining crumbled feta cheese and toasted pumpkin seeds.