Roll the toast slices flat with a rolling pin (lengthways and crossways), brush with butter and place a slice of Cervelatwurst on each slice of toast. Then roll up the toast slices tightly and place them next to each other in a baking dish (opening facing down).
Preheat the oven to 180 ° and bake on top / bottom heat for 20 minutes.
The rolls can be filled / topped as desired. E.g. also with blue cheese, toast cheese or salmon ham.