Sift flour. In a blender bowl, mix eggs, sugar and salt. Add flour and beat well again. Melt the butter in a water bath and add to the blender bowl along with milk. Stir again.
Heat a frying pan with oil and bake pancakes on both sides.
Thinly slice the tomatoes. Cut the white onion into thin rings.
Arrange a layer of thinly sliced tomatoes on a plate, followed by white onions and arugula. Sprinkle with oregano, salt and pepper.
In a cooled pancake, wrap the buratta and form a “pouch” by tying it with green onions.
Place the pancake bag on top of the tomatoes. Drizzle with olive oil and balsamic cream.