Smoked Tomato Soup

Name: Smoked Tomato Soup
Ingredients: 4 pounds plum tomatoes, halved, seeded, divided; ¼ cup olive oil; 1 large onion, chopped; 1 large leek, white and pale-green parts only, halved lengthwise, thinly sliced; 3 garlic cloves, crushed; 2 bay leaves; 2 teaspoons coriander seeds; 2 teaspoons finely grated fresh horseradish or prepared horseradish; 1½ cups low-sodium chicken broth; 5 tablespoons unsalted butter, room temperature; Kosher salt and freshly ground black pepper; Thinly sliced basil leaves (for serving); ½ cup hickory, pecan, or applewood chips