Peanut Butter Chocolate Tart

Ingredients

• 1/4 teaspoon salt
• 36 Oreo Cookies
• 1 large egg white
• 1 tablespoon unsalted butter
• 1/2 cup [60 g] confectioners' sugar
• 4 tablespoons [60 g] unsalted butter (melted and cooled)
• 1 1/2 cups [315 g] creamy peanut butter
• 3 tablespoons [45 g] unsalted butter (at room temperature)
• 1 teaspoon pure vanilla extract (or vanilla bean paste)
• 1 1/2 cups [360 g] heavy cream (divided)
• 7 oz [200 g] bittersweet chocolate (finely chopped)
• 1/4 cup [60 g] heavy cream
• Flaked sea salt (for sprinkling)