Clean the chanterelles, wash briefly and pat dry. Peel the onion. Finely dice onion and bacon. Peel the cucumbers (it is best to peel them from the base of the flower towards the end of the stem so that any bitter substances in the stem end are not spread over the whole fruit), cut them in half lengthwise and remove the seeds. Depending on the size, halve the cucumber halves again lengthwise, then cut into slices.
For the Röstitaler potatoes peel, wash, coarsely grate and squeeze. Stir in starch and egg, season with salt and nutmeg. Heat 2 tablespoons of clarified butter in portions in a large coated pan. Fry 12-16 small Rösti on both sides until golden brown. Keep the finished Rösti warm.
For the ragout, heat 1 tbsp. clarified butter in a frying pan and fry the chanterelles in it for about 3 minutes. Take them out. Fry the bacon in hot frying fat until crispy. Add onion and fry until translucent. Put the cucumbers into the pan and fry them briefly. Season with salt and pepper, pour on cream, bring to the boil, cover and steam for about 10 minutes.
Meanwhile wash the dill, pluck the flags and cut them finely. Add chanterelles and dill to the cucumbers. Season the ragout with salt and pepper. Serve with Rösti.