We found this recipe when we were looking for low carb ideas. It was so easy and delicious. My 12 year old wanted more! Make sure you use firm tomatoes.
Skillet-Seared Tomatoes with Melted Gruyere
From EatingWell: August/September 2005
Serve these as a savory side dish to chicken or steak, to complement a meatless meal or as a sandwich on toasted whole-grain bread. A pinch of sugar helps balance the tomatoes' acidity.