With the freezer method, you'll end up with as many pickles as you like, and because the process is less time-consuming, whipping up a new batch is easy when ... garlic cloves, onions, and herbs such ...
For the relish, quarter the cucumber lengthways, then thinly slice and place in a bowl along with the onion. Season with a few generous pinches of salt. Mix well and leave to rest for 15 minutes.