Tomato Soup and Grilled Cheese

Name: Tomato Soup and Grilled Cheese
Ingredients: ¾ cup warm (110 degrees) water; 1 teaspoon active dry yeast; 1 ¾ teaspoons sugar; ½ cup nonfat dry milk powder; 2 large eggs; 2 cups bread flour, plus extra for kneading; ¾ teaspoon salt; 4 tablespoons (½ stick) unsalted butter, at room temperature, cut into small pieces; 1 teaspoon olive oil; Nonstick pan spray; 12 ounces Bun Dough (above), prepared through the first rise; Flour, for dusting; 4 pounds ripe Roma tomatoes, halved lengthwise; 1 large sweet onion, such as Maui or Vidalia, cut into quarters; 8 garlic cloves, smashed; 3 fresh basil sprigs; 4 fresh thyme sprigs; ½ cup extra-virgin olive oil; 2 teaspoons table salt; ½ teaspoon freshly ground black pepper; 1 ½ tablespoons tomato paste; 6 cups chicken broth, vegetable broth, or water; 8 slices aged Gruyère cheese; 8 tablespoons (1 stick) unsalted butter, at room temperature