The leaves of dittander have a hot and pungent mustard like flavour, very like horseradish or wasabi.
Sauer’s Herbal Cures, an 18th century book of herbs, says:
“The leaves are prepared hot with vinegar and sugar…. They are served as condiments with roasted meats. In Switzerland it is customary to eat the leaves raw with meat. Some chop the leaves, then add black pepper, sugar and vinegar and eat this as a salad with meat dishes. made thus, it strengthens the stomach, awakens the appetite, and encourages digestion”.
Add wasabi flavour to salad and other dishes by using the chopped leaves, they lose some of the heat when cooked.