Make sure to go through the steps in order, and follow the recommended timeline for a better result. Line a cookie pan with parchment paper, and preheat the oven at 400F before starting to roll out the dough.
Make Pie Dough
Combine in a large mixing bowl, the flour and salt. Use a pastry cutter or clean hands to break apart the butter into the flour mixture, into a small crumb. Gently stir in the wet ingredients until the dough comes together.
1½ cup All Purpose Flour, ½ teaspoon Salt, ½ cup Unsalted Butter, ¼ cup Greek Yogurt, ⅓ cup Cold Water, 2 teaspoon Apple Cider Vinegar
Shape the dough into a disk and tightly wrap it with plastic wrap. Rest in the fridge for 30 minutes or until ready to roll out.
Prepare the Fillings
Cut the tomatoes into ¼ inch slices. The thicker slice with prevent them from falling apart. Place them in a large bowl and sprinkle each slice with salt. Let them sit in the bowl for 30 minutes. The salt with help to extract excess moisture from the tomatoes.
Combine in a medium mixing bow, the softened brick of cream cheese and the basil pesto. Use a hand blender to mix until well homogonous. Set aside.
Assemble the Galette
Roll out the chilled dough on a floured surface. Try to roll out the dough as even as possible in order to get a 15-inch in diameter circle.
Place the rolled out dough onto the lined baking tray. Spread the cheese filling evenly in the center of the dough, leaving a 2-3 inch edge all around.
Transfer the tomato sliced onto a parchment paper lined plate. Pat the slices down with paper towel to remove excess moisture.
Place the patted-down tomato sliced on top of the circle of cream cheese filling. They should slightly overlap for good coverage of the filling.
Fold over a 4-inch piece of the dough border over the filling. Continue doing so, a section at a time, overlapping on the last section, until all sides are folded in.
Make a quick egg wash with the yolk and milk. Lightly brush the crust border. Sprinkle the egg washed area with Everything Bagel seasoning.
Place the Tomato Pesto Galette into the preheated 400F oven. Bake for 20-25 minutes or until the crust is a nice golden color. Remove and let it cool for 5-10 minutes before serving. Garnish with the freshly chopped basil.