Start by preheating your oven to 170°C (340°F) so it’s ready for baking. Line a 20 cm cake tin with baking paper or lightly grease it with oil. This step prevents the cake from sticking and ensures an easy release later.
Place the caster sugar and lemon zest in a large bowl. Rub them together with your fingertips until the sugar becomes fragrant and slightly moist. This process releases the natural oils from the zest and intensifies the lemon flavor in the cake.
Add the eggs to the bowl with the lemon sugar mixture. Whisk everything together until the mixture becomes pale, smooth, and slightly frothy. This step helps incorporate air, which contributes to a lighter cake texture.
Pour in the lemon juice, olive oil, ricotta cheese, and vanilla essence. Whisk the mixture until everything is fully combined and smooth. The ricotta adds creaminess while olive oil ensures the cake stays moist.
Sift the flour and baking powder directly into the bowl. Gently fold them into the wet ingredients using a spatula. Mix until just combined to avoid overworking the batter, which could make the cake dense.
Add half of the blueberries to the batter and fold them in gently. This distributes berries evenly throughout the cake. When baked, they burst and create a jam-like texture that adds natural sweetness.
Pour the batter into the prepared cake tin and smooth the top with a spatula. Scatter the remaining blueberries on top and press them lightly into the batter so they remain partially visible.
Place the pan in the oven and bake for about 50 minutes or until the top turns golden. Insert a skewer into the center; if it comes out clean, the cake is done.
Allow the cake to cool in the pan for about 15 minutes before transferring it to a cooling rack. While the cake cools, whip the cream until soft peaks form and prepare the blueberry compote.
Slice the cooled cake and serve with a generous spoon of whipped cream, lemon curd, and wild blueberry compote. These toppings elevate the simple cake into a beautiful dessert.