Best Tarte Tatin - How To Make Tarte Tatin

Ingredients

• 1 sheet (10-oz) frozen puff pastry, thawed
• all-purpose flour, for rolling
• 9 to 10 small baking apples such as gala or honey crisp (about 3 lbs)
• 1/2 lemon, juice
• 1 tsp. pure vanilla extract
• 1 tsp. ground cinnamon
• 1 tsp. kosher salt, divided
• 1/2 c. granulated sugar, divided
• 1/4 c. (½ stick) butter, cut into small pieces