Preheat your Z Grills pellet grill to 350-400°F.
Using a sturdy knife, cut the pumpkin into slices. Scrape the seeds and stringy fibers from the interior and discard.
Place the pumpkin slices along with the garlic and onion into a grill pan and put the tray into the grill.
Grill them for 10-12 minutes until they turn golden brown.
In a large pot, combine the pumpkin, garlic, and onions with olive oil, salt, pepper, cream, honey, and vegetable stock. Let it simmer for 40-50 minutes.
Serve with a generous swirl of cream.