to me they taste a bit like asparagus with some lemony sharpness....very nice. There should be info on the jar about how long they last once open...I would say weeks kept in a fridge provided you get then out of the jar with a clean fork or spoon.
I can't see the writing on the back of the jar. I'd have to wait for OH to read it for me but that's okay as I have to wait for him to open the jar anyway....so so weak :-)
I can't think how to describe the taste except to say they are soft in texture and in flavour. I would use them for a pizza topping, in an omelete or quiche, or as you say, with a salad. They will keep a while in the jar treat them as you would pitted olives for example.