Step 1

Preheat the oven to 275 degrees.

Step 3

Arrange the tomatoes on a sheet pan, cut sides up, in a single layer. Drizzle with the olive oil and balsamic vinegar. Sprinkle with the garlic, sugar, 1½ teaspoons salt, and ½ teaspoon pepper. Roast for 2 hours until the tomatoes are concentrated and begin to caramelize. Allow the tomatoes to cool to room temperature.

Step 25

Cut the mozzarella into slices slightly less than ½ inch thick. If the slices of mozzarella are larger than the tomatoes, cut the mozzarella slices in half. Layer the tomatoes alternately with the mozzarella on a platter and scatter the basil on top. Sprinkle lightly with salt and pepper and drizzle lightly with olive oil. Serve at room temperature.