Sift flour, baking powder and salt into a large mixing bowl. Stir through sugar. In a jug, whisk together buttermilk, eggs and melted butter. Gradually stir into dry ingredients.
When ready to cook, fold blueberries into batter. Spray a frying pan with oil and heat on medium. Cook batter in 1/3-cup measures for 2-3 minutes, until small bubbles form. Turn and cook for another 2-3 minutes, until golden and cooked through. Repeat with remaining batter, using more butter when necessary. Serve with maple syrup and yogurt.