Step 1: Preheat your oven to 160°C (320°F) and grease/line an 8-inch round cake tin with parchment paper.
Step 2: In a large bowl, cream together the softened butter and caster sugar until pale and fluffy using an electric mixer.
Step 3: Add the eggs one at a time, beating well after each addition to ensure the orange pistachio polenta cake with rose glaze batter remains smooth.
Step 4: Fold in the ground pistachios, polenta, baking powder, and orange zest until just combined.
Step 5: Pour the batter into the prepared tin and bake for 45-50 minutes, or until a skewer inserted into the center comes out clean.
Step 6: While the cake is baking, simmer half the orange juice with a tablespoon of sugar to make a soak. Once the cake is out, prick it and pour the soak over.
Step 7: Mix the remaining orange juice, rose water, and powdered sugar to create a glaze. Pour over the cooled orange pistachio polenta cake with rose glaze.