This recipe sounded good so I did a trial batch last night and then another two jars this morning.
Verdict....delicious. Somehow I can't see these making it through to Christmas but then........I still have lots to pick in the garden so that won't be a problem.
All you have to do is blanch the beans for 3 minutes then cover them with the marinade made of equal parts red vinegar and olive oil, some chopped herbs (coriander in this case), salt, black pepper, some cumin seeds, minced garlic and a little lemon zest.