2 pounds pumpkin or winter squash, such as kabocha or butternut, seeds and membranes scraped away, cut into large pieces (if using butternut, cut in half crosswise, just above the bulbous bottom part, then cut these halves into lengthwise quarters and scrape away the seeds and membranes)

3 tablespoons extra virgin olive oil

1/2 medium onion, finely chopped

2 tablespoons finely chopped fresh mint

1/8 teaspoon freshly grated nutmeg

1/4 cup (1 1/4 ounces/35 g) lightly toasted walnuts, finely chopped

1 ounce Parmesan, grated (about 1/3 cup)

Salt and freshly ground pepper