Finnish Style Blueberry Pie

Steps

1. Melt 125 g of butter in a mixing jug.
2. Add half a cup of plain white sugar to the melted butter and stir well.
3. Crack one egg into the mixture and stir until combined.
4. In a separate mixing bowl, combine 1 1/2 cups of all-purpose flour, 1 pinch of salt, 1 teaspoon of baking powder, and 3 tbsp of oats. Mix together.
5. Add the wet ingredients (melted butter mixture) to the dry ingredients in the mixing bowl and mix until combined to form a slightly sticky dough.
6. Carefully mix in 150 g of sour cream (or natural yogurt/Greek style yogurt) into the dough until it is fully incorporated, resulting in a wetter sticky dough.
7. Grease the interior surface and sides of a quiche dish or pie plate with melted butter to prevent sticking.
8. Transfer the sticky dough into the prepared baking dish using a spatula. Press the mixture evenly across the entire bottom and up the sides, forming a pastry bowl shape.
9. In a separate bowl, combine 250 g of fresh blueberries (or frozen/thawed), 2 tbsp of sugar, and 1 tablespoon of cornflour or cornstarch.
10. Toss the blueberry mixture together until all berries are coated. Spread the blueberry mixture evenly over the dough base in the baking dish.
11. Preheat oven to 225° C (440° F).
12. Bake for approximately 25 minutes, or until the pie has risen slightly and is golden brown.