Prick the tart shell and bake in a preheated oven at 180°C for 10 minutes. Let cool.
Clean the sea hare thoroughly, blanch in boiling water for 5 minutes, then cut into small pieces.
In a bowl, mix Greek yogurt, honey, and lemon juice until well combined.
Pour the yogurt mixture into the cooled tart shell and spread evenly.
Top with the sea hare pieces as garnish.
Refrigerate for at least 30 minutes, then slice the finished tart.