Preheat oven to 400F
Chop veggies, add seasoning and roast in oven for about 30 minutes
Add roasted veggies to blender along with bone broth, half and half, and basil leaves, then blend until smooth
Add soup to pan on high heat, bring to a boil, then simmer for about 10 minutes or until it thickens
While soup is boiling, coat outside of sourdough slices in light mayo to make them crispy
Add sourdough to pan on low heat, add cheese between slices and close sandwich
Flip sandwich every 1-2 minutes until cheese melts and bread becomes golden
Serve soup with grilled cheese sandwich
