Preheat oven to 400 degrees F (200 degrees C).
In a small bowl, mix Tahini (1/2 cup) and Honey (1/4 cup) until smooth.
Roll out Pie Crust (1) into a 11 inch round and place on a baking sheet lined with parchment.
Spread halva (tahini & honey mixture) onto pie crust leaving about 1 inch border around the edge of the crust.
Place Grapes (12 ounce) cut side down on top of halva, leaving about 1-inch border around the edge of the halva.
Gently use the parchment paper to fold up the edges of the crust around the grapes, one section at a time.
Brush the crust with the Egg (1) and lightly sprinkle the entire galette with Sea Salt (to taste).
Bake for about 20 minutes until nice and golden. Remove from oven and let cool.
While galette cools, make the whipped cream. Whip Heavy Cream (1 cup) and Honey (1 tablespoon) until soft peaks. Add Greek Yogurt (1/3 cup) continue to whip until a bit firmer.
Serve galette with a dollop of greek yogurt whipped cream atop each slice. Enjoy!