1. Cut out the middle of the tomatoes so there is adequate room to stuff them.
2. Layer cheese, herbs and a splash of balsamic in the middle. Finish with salt and pepper.
3. Grill on a medium heat grill (about 350 degrees) until the cheese is melted and the tomatoes have begun to slightly char on the bottom, about 5 minutes. (Keep the grill cover closed while grilling to retain heat.)
4. Add additional cheese and herbs if you like before serving. Pair with your favorite main course for a nice, colorful presentation!