Preheat oven to 425 degrees. In a large bowl combine the flour, baking powder, and salt. Stir in milk and olive oil and mix until combined. Turn out onto a floured board and knead until combined and smooth. Roll or press dough on a lightly greased baking sheet until approx. 1/4 inch thick. Top dough with the cheese and vegetables. Drizzle with olive oil and season with salt and pepper. Bake 20 - 25 minutes or until golden brown.