Step 1: Preheat your oven to 350°F (175°C) and grease a 9-inch round cake pan or line it with parchment paper.
Step 2: In a medium bowl, whisk together the semolina, all-purpose flour, baking powder, baking soda, and salt.
Step 3: In a large bowl, cream the softened butter and granulated sugar together until light and fluffy, about 3-4 minutes.
Step 4: Add the eggs one at a time to the butter mixture, beating well after each addition. Stir in the blood orange zest and 1/4 cup juice.
Step 5: Gradually add the dry ingredients and the Greek yogurt to the wet ingredients, alternating between them, starting and ending with the dry mixture. Mix until just combined.
Step 6: Pour the batter into the prepared pan and smooth the top. Bake for 40-45 minutes, or until a skewer inserted into the center comes out clean.
Step 7: Allow the cake to cool in the pan for 10 minutes before transferring to a wire rack to cool completely.
Step 8: To make the glaze, whisk the powdered sugar with enough blood orange juice to reach a thick but pourable consistency. Drizzle over the cooled cake and let it set before serving.