Sprinkle a baking sheet with flour. Sift half of the flour in a dish. Mix the acid dough with water and shredded pressed yeast, add it to the flour and leave this prior mass covered in a warm place overnight.
Add salt, pepper and cardamom with the rest of the flour to the fermented dough and knead it well until it bubbles.
Peel the onions and chop very fine. Brown half of the onion in the butter or margarine and add it to the dough along with raw onions.
Form the dough three loaves of 35 cm of length and place them on the baking tray. Let stand covered breads others 15 minutes.
Heat oven to 250 degrees. Paint the breads with water and give several sloping cuts on the surface with a thin, sharp knife.
Cook 30 minutes in the bottom of the oven.
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