Preheat the oven to 350°F (175°C).
Cut the tops off the tomatoes and scoop out the pulp, leaving a shell. Reserve the pulp.
In a large bowl, combine the reserved tomato pulp, cooked rice, parsley, basil, oregano, thyme, mozzarella cheese, salt, and pepper. Mix well.
Spoon the rice mixture into the tomato shells, packing it tightly.
Place the stuffed tomatoes in a baking dish and bake for 45 minutes or until the tomatoes are tender and the cheese is melted and golden brown.
Serve hot and enjoy!