This easy peasy, 1-ingredient tart is full of juicy delicious tomatoes to take your palate on a cheap flight to flavor paradise. Spread rolled puff pastry onto the baking mold and prick with a fork. Spread with a layer of Dijon mustard, then top with tomato slices. Sprinkle on some chopped herbs, such as basil and parsley, and drizzle on a bit of olive oil. Throw in the oven at 350 °F for 25 minutes or until the crust is golden brown.