Garlic & Rosemary Slow Roasted Tomatoes. This is one of those recipes that I’ll make again and again because they’s so distinctive and delicious. Preparation is simple, even if it takes a few hours. As the name implies, the cherry tomatoes are simply roasted over very low heat with garlic and herbs. Two days later, we’ve eaten all of the slow roasted tomatoes, but the kitchen still smells faintly – wonderfully- of rosemary.