Heat the oven to 400 degrees
Spray the inside of a 10×10 baking pan with canola oil. Place the sheet of puff pastry inside the baking pan.
Top the puff pastry with a layer of goat cheese.
Place the tomatoes across the puff pastry to cover the goat cheese
Add a drizzle of oil on top of the tomatoes and goat cheese. Sprinkle with sea salt. Add a generous drizzle of balsamic vinegar on top of the tomatoes.
Place the egg in a small bowl and whisk it to make an egg wash.
Lightly coat the edges of the puff pastry with the egg wash.
Place the baking pan into the oven and cook for 40 minutes or until the edges are golden brown. Remove the tart from the oven.
Evenly distribute the basil over the tart. Serve immediately or at room temperature.