Sort the blueberries, wash and drain. Wash the orange, rub dry and thinly grate the skin. Squeeze the orange. Caramelise 30 g sugar in a small pot. First add 2 tablespoons of orange juice, then 125 g blueberries and simmer for 2-4 minutes (until the caramel has dissolved).
Remove the blueberries from the heat, add the liqueur and chill. Meanwhile, for the wafer dough, grate the orange zest, fat, 50 g sugar, vanillin sugar and salt with the whisk of the hand mixer until creamy.
Stir in 3 eggs one after the other. Mix flour and baking powder and stir in alternately with milk and cream. Place about 1 1/2 tablespoons of dough in the middle of each greased preheated waffle iron and bake until golden brown.
From the remaining dough bake another 7 waffles in the same way. Keep the waffles warm. Mix egg yolks, 1 egg and 75 g sugar in a metal bowl (which you can put on a hot water bath) until creamy but not frothy.
Place the bowl on a hot water bath (must not boil but must be kept below boiling point), immediately add wine and lemon juice and beat vigorously with a whisk until the cream becomes frothy and has at least double the volume.
Add 125 g blueberries to the blueberry compote. Serve the waffles, blueberries and zabaglione immediately (zabaglione quickly collapses again).