Preheat the oven to 175 °C / 347°F.
Add the 1 tablespoon of flour to the blueberries, make sure they are well coated in flour, and leave them on the side for when the batter is ready.
Prepare the dry ingredients by adding the salt and baking powder to the flour and mixing to combine.
Beat the eggs and the sugar together until the mixture whitens and thickens.
Add the vegetable oil while continuously mixing, then add the yogurt and mix until well incorporated.
Sift in the dry ingredients into the wet ingredients and mix shortly to incorporate. Do not overmix at this point.
Add the flour-coated blueberries and gently fold them into the batter using a spatula.
If you prepare the batter in advance of the rest of the ingredients, only fold in the blueberries right before baking so they don't sink.