Add flour, sugar, whisked egg, yeast, orange zest and salt to the sponge.
Knead everything into a dough.
Dust the work top with some flour. Remove the dough from the bowl onto the worktop.
Start kneading the dough, adding very little flour if required. Don't add too much flour.
The dough will feel sticky but knead it if possible without adding flour. Instead use the measured butter little at a time.
Knead the dough for 5-7 minutes.
Add the soaked raisins and almonds. Using the remaining butter knead the dough till it is soft and silky. By now it should not be too sticky. It may stick a bit to your fingers but that is fine.
Grease the bowl with some butter.
Shape the dough into a boule. Rub some butter over it. Place it in the prepared bowl.
Cover with a damp towel or cling film and allow the dough to ferment for 30 -45 minutes.
Dust the worktop again with some flour.
Take the dough out of the bowl. Knead it very gently.
Shape the dough into a tight boule.
Line a baking sheet with parchment paper or use a silicon mat.
Place the dough boule onto the parchment paper or silicon mat.
Cover it with a damp cloth or cling film and allow it to ferment or rise for 30 minutes.
Score the the top with a cross. Allow the dough to rise for a further 15 -20 minutes.
In the meantime, preheat the oven to 200°C.
Place a tray with water at the bottom shelf. This will help create the steam.
Brush the top of the bread lightly with some milk. Can use the milk that you soaked almonds in.
Open the oven BUT BE CAREFUL AS THERE WILL BE STEAM.
Place the bread dough in the oven.
Bake for 15 -20 minutes till the top is golden brown.
Cover the bread with some foil so that the top does not burn. BE CAREFUL AS THERE WILL BE STEAM IN THE OVEN. Wear oven mitts to prevent your hands from burning or scalding.
Reduce the heat to 180°C.
Bake further for 20 -25 minutes.
Remove the bread from the oven. BE CAREFUL AS THERE WILL BE STEAM IN THE OVEN.
Place the bread on a wire rack.
While the bread is still hot brush the top with the apricot jam.
Sprinkle the almond slivers on top. Allow the bread to cool down completely before you slice it.
Enjoy Osterbrot on its own or with some butter and marmalade or jam of your choice.