In a small bowl, combine brown sugar, flour, cinnamon and chopped almonds.
Cut in butter until crumbly.
Preheat oven to 180°C .
Prepare a 25cm spring form or a 20 x 10cm loaf pan with cooking spray.
Sift together the flour, baking powder and salt. Keep it aside.
In a large bowl, cream together the butter and sugar until it is light and fluffy.
Beat in the eggs.
Fold in the flour mixture alternately with the milk, yoghurt and lemon zest.
Mix it until it is fully incorporated.
With a rubber spatula spread 2/3 of the mixture in the pan and sprinkle 1 cup of the berries evenly on top. Spread the remaining batter on the top and top with the remaining blueberries.
Spread the streusel evenly over the top.
Bake in the preheated oven for 45 to 50 minutes.
Cool on a wire rack for about 30 minutes before cutting.