In a large bowl, combine the flours; cut in butter until crumbly. Gradually add water, tossing with a fork until dough forms a ball. Cover and refrigerate for 30 minutes or until easy to handle.

On a lightly floured surface, roll out pastry to fit a 9-inch fluted tart pan with a removable bottom. Transfer pastry to pan; trim even with edge. Bake at 350°F for 13-15 minutes or until lightly browned. Meanwhile, thinly slice the tomatoes; place on paper towels to drain.

Sprinkle 2 cups cheese into the crust; top with basil. Set three tomato slices aside; arrange remaining slices in a slightly overlapping pattern around edge of tart. Drizzle with oil; sprinkle with salt and pepper. Sprinkle remaining cheese in center of tart; top with reserved tomato slices.

Bake for 25-30 minutes or until crust is crispy and cheese is melted. Let stand for 15 minutes before serving.