Steps:

• Preheat oven to 350 degrees F (175 degrees C). Line a baking sheet with parchment paper.
• Combine the flour, sugar, ground almonds, baking powder and baking soda.
• Combine the lemon peel, poppy seeds, egg, egg whites and lemon extract. Add the dry mixture and mix well. Form the dough into 2 logs.
• Place logs onto the prepared baking sheet. Bake at 350 degrees F (175 degrees C) for 30 minutes. Let cool slightly and cut diagonally into 1/2 inch slices. Bake slices another 8 to 10 minutes until dry. Cool completely and store in an airtight container.

Steps:

• Heat oven to 350 degrees. Butter and flour an 8-inch loaf pan.
• In a bowl, combine lemon zest and sugar and rub with your fingers until it looks like wet sand. Whisk in buttermilk, 3 tablespoons lemon juice and eggs. In a separate bowl, whisk together flour, baking powder, baking soda and salt. Whisk dry ingredients into the batter, then whisk in oil and poppy seeds.
• Pour batter into prepared pan. Bake until a toothpick inserted in the center emerges clean, about 1 hour. Let cool in pan until warm to the touch, then turn out onto a baking rack set over a rimmed baking sheet. Turn cake right side up.
• Whisk together remaining 4 teaspoons lemon juice and the confectioners’ sugar. Use a pastry brush to spread glaze evenly over top and sides of cake. Cool completely before slicing.