Heat the extra virgin olive oil in a medium-large saute pan.
Gently saute the celery for about 30 seconds
Add the bell peppers for another 30 seconds
Lastly, add the zucchini for another 30 seconds.
Take the pan off the heat.
Salt and pepper the vegetables to taste
Arrange the tomatoes and cheese slices in a salad plate or a serving dish.
Top the tomatoes and cheese with the sauteed vegetables.
Sprinkle the top with the basil, oregano and thyme leaves.