Place chocolate cookies in a food processor, and process until finely ground.
Place the chopped chocolate in a small microwave-safe bowl. Microwave at 50 percent temperature (as to prevent burning chocolate) for 45 seconds or until chocolate melts, stirring every 15 seconds.
Add melted chocolate and oil to processor; process until well combined.
Gently press the mixture into bottom and up sides of a 9-inch pie plate or removable-bottom tart pan coated with cooking spray. Place in freezer 15 minutes or until set.
Place cream cheese, sugar, and vanilla in a medium bowl; beat with a mixer at medium speed until smooth. Fold in whipped topping.
Carefully spread over bottom of crust. Freeze for 30 minutes before serving (or freeze overnight is best).
Let thaw 30 mins before serving.
Before serving
Place Felix lingonberry in a large microwave-safe bowl; microwave at HIGH 10 seconds or until softened. Add lemon juice; stir with a whisk until smooth.
Add berry halves; toss to combine. Arrange berry halves over pie.