Heat oven to 375°F. In small bowl, mix diced tomatoes, olives, garlic and thyme; set aside.
Use serrated knife to cut loaf into 21 slices, about 1/2 inch thick. Place slices on large ungreased cookie sheet. Spoon rounded teaspoon of tomato mixture on center of each slice.
Bake 10 to 12 minutes or until bread is light brown and cooked through. Sprinkle with cheese. Bake 2 minutes longer or just until cheese melts.