In a large bowl, mix the flour, yeast, sugar, and salt.
Add the Öl oder Butter, then gradually add the lauwarmes Wasser, mixing to form a soft dough.
Knead for 8–10 minutes until smooth and elastic.
Cover and let rise in a warm place until doubled in size (about 45–60 minutes).
Grease a heatproof bowl or dish that fits inside a pot.
Punch down the dough, shape it, and place it into the greased bowl.
Bring water to a simmer in a large pot (water should not touch the bowl).
Place the bowl inside, cover tightly, and steam for 40–45 minutes on low heat.
Check doneness with a skewer — it should come out clean.
Remove, cool slightly, and serve warm.