Heat the oven to 350 degrees and grease a 9x13 baking dish.
Add the cabbage to a baking dish. Drizzle with olive oil and season with salt and pepper
Bake for 40 minutes.
While the cabbage is baking, add the butter to a skillet over medium heat, and saute the onions until softened.
Add in the garlic and saute for 30 more seconds or until fragrant.
Pour in the heavy whipping cream, Italian seasoning, fresh thyme and salt and pepper to taste. Simmer until the sauce thickens and then remove from heat.
Pour the sauce over the roasted cabbage and bake for another 30 minutes.
Top with the cheese and broil for 2-3 minutes.
(optional) Garnish with bacon pieces, Parmesan cheese and chopped parsley.