Heat oven to 400°F. Spray large cookie sheet with cooking spray. Unroll dough on cookie sheet; starting at center, press out dough into 15x10-inch rectangle. Brush with 1 tablespoon of the oil; sprinkle with herbes de Provence.
Bake 15 to 18 minutes or until light golden brown.
Meanwhile, in medium bowl, mix tomatoes, olives, garlic, remaining 2 tablespoons oil, the chopped basil, pepper and salt.
Cut flatbread into 24 pieces. Top evenly with tomato mixture. Garnish with basil leaves.