1. Bring a large pot of salted water with a lid to a boil for the pasta. Finely chop the garlic and onion.
2. Cut the fennel in half, then into quarters, remove the tough core, and slice the rest.
3. Cook the pasta, drain, and set aside.
4. Meanwhile, heat the olive oil in a wok or sauté pan with a lid over medium-high heat.
Cook the ground meat for 3 minutes. Add the onion and garlic (and Italian spices). Cook for another 2 minutes. Add the fennel and 1 tablespoon of water per person. Season with salt and pepper, then let it cook covered for 5 minutes.
5. Over low heat, tear the spinach over the wok, possibly in multiple batches, and let them wilt while stirring. Add the cream and half of the grated cheese, then mix well. Add the pasta, season with salt and pepper, then heat for 1 minute.