Slow Roasted Plum Tomatoes

Bahan-bahan (4 porsi)

• 1½ pounds (about 6) large plum (Roma) tomatoes
• 2 tablespoons olive oil
• 1 pinch dried thyme
• 1 head garlic, (peeled and cloves smashed)
• kosher salt, (to taste)
• 2 tablespoons balsamic vinegar