Heirloom tomato tart tatin with anchovy breadcrumbs

Name: Heirloom tomato tart tatin with anchovy breadcrumbs
Ingredients: 1 sheet of frozen puff pastry, thawed and rolled out; 2 tablespoons butter; 3 medium leeks, washed and thinly sliced (white and light green portions only); 2 tablespoons Balsamic vinegar; 1/2 tablespoon olive oil; 1 tablespoon sugar; 2 pints mixed heirloom cherry tomatoes; salt and pepper; 2 tablespoons Dijon mustard; 1 cup Panko bread crumbs; 2 tablespoons olive oil, divided; 6 anchovy fillets; 1 clove garlic, peeled and halved; 1/4 cup chopped flat leaf parsley; 1/4 cup chopped fresh basil; 1/2 tablespoon fresh thyme, chopped