Preheat the oven to 160° C /320 ° F degrees. Spray some oil in it and Line a loaf pan with baking paper
In a bowl, whisk together the yogurt, sugar, eggs, lemon juice, vanilla extract and vegetable oil.
In a large bowl whisk together the flour, baking powder and salt.
Add flour mixture into wet ingredients in 2 batches, mixing well with each addition.
In a bowl toss blueberry with 1 tbsp of plain flour and fold them in the batter.
Pour the mixture into prepared tin and bake until skewer comes out clean. It can take around an hour or slightly more. If the cake is turning brown on the top cover it with foil.
While the cake is in the oven prepare lemon icing by combing icing sugar, lemon juice and milk. It should be pouring consistency. Add more milk to adjust the consistency.
Once the cake is done, remove it from the oven and cool it on wire rack. Allow the cake to cool down to room temperature and then drizzle or pour the icing over the cake.