Lemon and Blueberry Upside Down Cake

Bahan-bahan (8 porsi)

• ¾ cup packed light brown sugar
• ½ cup (1 stick) unsalted butter, (cut into 4 pieces)
• 1½ cups fresh blueberries
• ¾ cup cake flour
• ¼ teaspoon baking powder
• ¼ teaspoon sea salt
• 4 ounces (scant ½ cup) almond paste, (broken into small pieces)
• ½ cup granulated white sugar
• 3 tablespoons finely grated lemon zest
• ½ cup (1 stick) unsalted butter, (cut into 8 pieces, at room temperature)
• 3 large eggs, (at room temperature)
• freshly whipped cream ((optional))
• additional blueberries ((optional))