Kue Custard Biji Poppy Blueberry Lemon

Bahan-bahan (10 porsi)

• 1/2 cup , plus 2 tablespoons granulated sugar
• 1 stick (8 tablespoons) salted butter, at room temperature
• 1 tablespoon lemon zest, use Meyer if you can
• 1 large egg, at room temperature
• 1 tablespoon , plus 2 teaspoons vanilla extract
• 1 1/2 cups all purpose flour
• 2 tablespoons poppy seeds
• 1/2 teaspoon baking soda
• 1/4 teaspoon kosher salt
• 1/2 cup sour cream or plain Greek yogurt
• 1 1/2 cups heavy cream
• 4 large egg yolks
• 2 cups fresh or frozen blueberries thawed and drained
• 1 teaspoon granulated sugar
• 1 teaspoon all purpose flour
• powdered sugar, for dusting