Preheat the oven to 400 degrees F.
Into a large baking dish (at least 9X9), add the sliced onions, balsamic glaze,olive oil, sun dried tomatoes, and Italian seasoning. Mi well. Place the prepped garlic in the center of the dish, Drizzle the exposed garlic coves with olive oil. Cover the dish tightly with foil.
Bake for 60-70 minutes or until the onions have caramelized. I like to stir the onions 2 to 3 times throughout the baking time.
About 10 minutes before the onions have finished baking, start on boiling the pasta as per the package instructions. Reserve about 1/2 cup of the pasta water.
Remove the onion mixture from the oven. Using a kitchen towel to protect your hands, squeeze the garlic from the peel, directly onto the onion mixture. Add the Boursin (or cream cheese) cheese and stir to combine. Add in the hot pasta and touch of the starchy pasta water, if needed.
Toss well and feel free to garnish with basil, parmigiano, and chili oil, if desired. Enjoy!