Preheat oven to 350F degrees
Mix together the whole wheat flour, all purpose flour ,baking powder, salt and cloves
In a separate bowl mix together the orange juice, orange zest, eggs, sugar, sour cream and, vegetable oil. Whisk until all the wet ingredients are well incorporated
Fold in the dry ingredients into the wet ingredients until just combined. Do not overmix the batter
Coat the blueberries with about one tablespoon of flour.
Fold the coated blueberries gently into the batter. Do not add the excess flour leftover from coating the blueberries into the batter.
Pour the batter into a prepared loaf pan and top with walnut pieces
Bake in preheated oven for 1hr 10mins or until a toothpick comes out clean
Leave it to cool for a few mins, then Enjoy!