Portions of this tart can be made ahead of time and assembled and baked before serving. Partially bake the crust as directed and store uncovered at room temperature up to 24 hours. Cook the vegetables as directed in step 3 but do not add the olives and basil. Cover and refrigerate up to 24 hours. Allow vegetables to stand 30 minutes at room temperature before filling crust. Stir in basil and olives. Continue assembling and baking tart as directed above.