Peel, wash and quarter the potatoes and boil them in salted water for about 20 minutes. Sort spinach, wash and shake dry. Heat 1 tablespoon butter in a pan. Collapse the spinach in it, put it in a sieve and drain it.
Drain the potatoes and mash them finely with 150 ml milk and 2 tbsp butter. Mix flour and baking powder and stir into the mashed potatoes with 2 eggs. Stir in spinach. Season to taste with salt and pepper.
Preheat a rectangular waffle iron for Belgian waffles, brush with oil. Place 1 heaped tablespoon of dough in each of the depressions in the iron and bake in succession to make a total of approx. 16 golden brown wafers.
Meanwhile wash the chives, shake them dry and cut them into fine rolls. Cut the cress from the bed. Stir curd, 4 tbsp. milk and lemon juice until smooth. Season with salt, pepper and 1 pinch of sugar. Stir in chives and half of the cress.
Heat 2 tablespoons of oil in a large frying pan. Fry 4 eggs in it until they become fried eggs. Season with salt and pepper. Arrange waffles, fried eggs and quark. Sprinkle with the remaining cress.