Heat a small pan over medium heat and add the pancetta and the diced, fresh pumpkin. Cook for 10-12 minutes until the pumpkin cubes are slightly brown and soft. Season with salt and pepper if necessary Set aside.
In a small sauce pan, bring the chicken stock to a simmer and turn down the heat to leave it hot during the entire cooking process.
Heat a splash of olive oil in a big pot over medium high heat, add the onions and slowly cook them, stirring occasionally, until they are soft and translucent. 5-8 minutes.
Add the risotto rice and toast the rice for 4-5 minutes until it smells fragrant and nutty.
Now add the white wine, reduce the heat and start stirring.
You don't have to stir constantly, but it's important to stay close to the pot and give it a stir every 30-60 seconds to release the starch in the rice, that gives the risotto its creamy texture. You do not want the rice to stick to the bottom of the pot, so watch the heat. The goal is too keep the risotto liquid during the cooking process. My rule of thumb is: If you see the bottom of the pot during stirring, you need to add more liquid. So whenever you feel the rice gets too dry, add another ladle full of chicken stock.
After two portions of chicken stock, add the pumpkin puree, the thyme and rosemary and season it carefully with salt and pepper. Be careful, because the chicken stock brings salt to party already.
Keep adding liquid to the risotto until the rice is cooked, but not too soft. Risotto is not supposed to be super soft.
Make sure you add enough liquid in the end, so your risotto is still flowing when you plate it. Risotto is never supposed to stand up in heap, but rather melt onto the plate.
Take the rice off the heat, stir in half the pumpkin/pancetta mix,
Finally stir in the butter and the parmesan, adjust the seasoning if necessary and serve immediately. Sprinkle each plated risotto with the leftover pumpkin/bacon mix.