Whisk the eggs with sugar till thick and ribbon like

Add the oil and sour milk and whisk

Add salt,baking powder to the flour and mix.Fold in the flour.add 1 tablespoon lemon zest,1tablespoon lemon juice

Dust the blueberries with alittle flour so that the dont sink to the bottom

Put half batter in the greased tin then add blueberries then add the other half

Bake in a preheated oven for50 mins at 180 degrees