1. Rinse and peel the pumpkin.
Cut the flesh into cubes and cook for 10 minutes in a steamer or microwave, then blend into a smooth puree (or thaw 400g of frozen pumpkin puree).
2. Coarsely chop the hazelnuts and toast them for a few seconds in a dry pan. Set aside.
3. Prepare a broth by dissolving the cube in 3/4 liter of boiling water.
4. In a sauté pan, sauté the finely minced onion in hot oil without browning.
Add the rice and stir until the grains become translucent.
5. Add the pumpkin puree, season with pepper and mix well using a wooden spoon. Add a little broth, mix and simmer over low heat until the liquid is absorbed.
6. Add a little more broth, continue to mix until the rice is cooked (about 20 minutes, it should have a tender but not sticky consistency). Depending on the variety of rice used, the broth may not be completely used.
7. Remove from heat, add the Parmesan cheese and crushed hazelnuts, mix, cover and let rest for 5 minutes before serving.