Preheat the oven to 350°Fahrenheit (175°Celsius). Grease a 9-inch round cake pan and line the bottom with parchment paper. Additionally, cut an extra strip of parchment paper, about 2 inches wide and as long as the pan's diameter. Place it in the bottom of the pan with some overhang on two opposite sides, ensuring it's well-greased. This will make lifting the cake out of the pan easier after baking.
Wash and dry the blueberries, then toss them in 1 tablespoon of flour to prevent sinking. Set aside.
Rub 1 1/2 tablespoons of lemon zest into the granulated sugar in a large mixing bowl. Add olive oil, vanilla extract, eggs, and egg yolk. Whisk until well combined.
Stir in ricotta cheese until smooth.
Add the baking powder, baking soda, and salt, mixing until evenly distributed. Gently fold in the cake flour until just combined, being careful not to overmix.
Pour 1/3 of the batter into the prepared cake pan. Then, gently spread the blueberries coated in flour in a single layer on top of the batter.
Top with the remaining 2/3 of the cake batter.
Bake for 40-45 minutes until the top is golden brown and a toothpick inserted into the center comes out clean. Make sure to rotate the pan halfway through.
Allow the cake to cool in the pan for 10 minutes, then transfer it to a wire rack to cool completely for 30 minutes.
Whisk together confectioners’ sugar, vanilla extract, and lemon juice in a small bowl until smooth.
Once the cake has cooled, gently pour the glaze over the top, spreading it evenly with an offset spatula.
Allow the glaze to set for about 15 minutes before slicing and serving.
Slice and serve your delicious blueberry ricotta cake. If serving the next day (it's even better after being allowed to sit out overnight), wrap in plastic wrap or place in an airtight container and leave on the counter.