Cut the onions into small cubes and sauté in butter. Dissolve the yeast in the water and knead with the other ingredients to form a dough.
Finally add the onion cubes. If you add them at the beginning, the roasted onions will smear into the batter, creating a dark crumb. The bread becomes unsightly when cut. In a properly prepared spelled onion bread, the roasted onion pieces stand out clearly from the batter.
Let rise for 40 minutes, then knead, let rise for 5 minutes, shape into a wake-up. Place on a greased baking sheet and let rise for about 25 minutes. Brush with water, then cut the surface crosswise 1 cm deep with a sharp knife. This creates the strong crust.
Put the bread in the oven at a temperature of 230 ° C (preheated), place a vessel with water and bake at a temperature of 190 ° C for about 60 - 70 minutes. The spelled and onion bread is very crispy and tastes best fresh from the oven.