Melt the butter in a small pot. Finely chop the anchovies. Wash parsley, shake dry and chop finely. Mix parsley, coarse salt and anchovies with butter. Pour the peppers into a sieve and drain well.
Cut the peppers into wide strips.
For the dough, place flour, baking powder, quark, milk, oil, sugar, salt and egg in a mixing bowl and knead into a smooth dough with the dough hooks of the hand mixer.
Form the dough into a roll (approx. 50 cm long) with floured hands on a floured work surface. Then roll out into a rectangle (approx. 26 x 70 cm) on the floured work surface.
Spread the dough evenly with spiced butter and cover loosely with paprika. Cut into approx. 7 strips (approx. 10 x 26 cm). Grease a box form (approx. 26 cm long, 10.5 cm wide and 7 cm deep) and dust with flour.
Place the box mould with the short side down, almost vertical. Fold each strip of dough into a Z-shape to a size of approx. 8.5 x 10 cm. Start with the coated side facing upwards.
Lay them on top of each other in the box mould. Place the tin horizontally, pluck the dough layers more evenly into the tin. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for approx. 1 hour on the bottom rack.
Cover with foil after 30 minutes of baking time.
Remove from the oven, place on a cake rack, allow to cool for approx. 45 minutes and carefully turn out of the mould.