Mix flour with corn starch, baking powder, 1 pinch of salt and sugar in a bowl. Stir in milk and eggs. Let the dough swell for 30 minutes.
In the meantime, let the blueberries thaw. Grate the skin of the untreated orange. Squeeze both oranges. Caramelise 3 tablespoons of sugar in a small pot until light brown. Add orange juice (approx. 125 ml), orange peel and blueberries and bring to the boil while stirring, dissolving the caramel.
Season to taste with the remaining sugar. Mix the starch with a little cold water, stir into the blueberries, bring to the boil once and let it cool down.
Stir the dough. Bake small pancakes in little hot clarified butter. Arrange the pancakes with the orange-blueberry sauce.