Stir in all remaining ingredients (except the rye flour) into the bowl – mix well until you have a firm but sticky dough. It should be firm enough to scoop rolls onto a baking sheet without spreading.
Check if the dough needs more flour and add the rye flour if necessary.
Let it rise overnight in the refrigerator.
Preheat the oven to 200 degrees Celsius (392 degrees Fahrenheit) (regular oven) the next morning.
Use a spoon to scoop dollops of dough and place them on a baking sheet lined with parchment paper.
Bake for about 20 minutes until they are crispy and golden.