Preheat the oven to 375 and line a baking sheet with parchment paper or a silicone baking mat.

Mix In a large bowl, whisk together the flour, sugar, baking powder and salt.

Cut the butter into small pieces and incorporate it into the flour mixture with a pastry knife. Mix until the butter is in pea size or smaller pieces.

In a small bowl, mix the whipping cream, beaten egg and vanilla.

Add the liquid mixture into the butter and flour mixture and stir to combine. Add in blueberries and lemon zest. Do not overmix.

Turn it out on a floured surface and give it a few quick kneads until it just barely comes together.

Form the dough into a circle and pat it out until it's about 7 inches around. Slice into pie pieces with a sharp knife and place the dough on the prepared cookie sheet. Brush with heavy cream or milk to help the tops brown (optional).

Bake 15 to 18 minutes until browned.