<p>&nbsp;Roll out the puff pastry between two sheets of parchment paper then between two baking trays and bake for pre-cooking.&nbsp;</p><p>Wash the tomatoes and slice them.</p><p>Mix the mustard and the cream.</p><p>&nbsp;Spread the mixture over the puff pastry.</p><p>&nbsp;Sprinkle the base with the two cheeses.</p><p>Arrange the tomato slices on top.</p><p>Drizzle with olive oil and bake.&nbsp;&nbsp;</p>