Roasted Tomato Soup with Chipotle

Name: Roasted Tomato Soup with Chipotle
Ingredients: 3 pounds fresh plum or garden tomatoes , cored and sliced in half; 1 onion , peeled and quartered lengthwise (root end to top); 4 to 5 cloves garlic , left in the skins; 1 red bell pepper , cored and sliced in half; Extra virgin olive oil; Kosher salt; 1 to 2 chipotle chiles (canned in adobo), roughly chopped; 2 cups chicken stock (or vegetable broth for vegetarian option); Sliced fresh basil or chopped fresh cilantro for garnish; Sour cream for garnish