Preheat oven to 250F.

Dice tomatoes, pepper, and onion. Add to a baking sheet with a drizzle of oil. Trim the top off of a whole bulb of garlic, or separate into cloves and add to the veggie. Add basil.

Roast vegetables until all are tender, stirring occasionally to prevent burning.

Add roasted vegetables to a large pot. Squeeze garlic from husks. Add stock to cover vegetables, then blend with an immersion blender until smooth.

Cook on medium heat until warmed through. Season with salt and pepper as desired, then serve!