Preheat the oven to 400˚F.
Slice off the top of the garlic head, exposing the cloves.
Place veggies on a sheet pan, drizzle with olive oil, sprinkle with seasonings, and roast for 40-45 minutes.
Heat the broth.
Blend the roasted veggies with hot broth and lemon juice until smooth.
Serve hot with grilled cheese or those amazing grilled cheese croutons!