Clean and wash the chicory and cut out the bitter core at the bottom with a sharp knife. Now halve the flask lengthways and cut into pieces. Wash tomatoes, cut crosswise, scald, peel and core. Eighths and mix with the chicory pieces.
Peel the onions and finely dice them. Prepare a marinade from vinegar and oil. Wash the parsley, chop it finely and mix it with the marinade. Season with salt and pepper and add the onion cubes at the end. Pour over the prepared vegetables.