1/4 cup/50 ml extra-virgin olive oil
1 white onion, coarsely chopped
1 pound/500 g fresh porcini mushroom, cleaned and coarsely chopped
1 bunch spinach, washed, dried and chopped
1 fresh chile pepper, chopped
2 1/2 cups/600 ml water
Salt and freshly ground black pepper
1/4 cup/50 ml freshly grated Parmigiano cheese, for sprinkling