Upon request, I am posting this. It is a “little of this, a little of that recipe” so take liberties.
1 medium onion, thinly sliced
1 medium cucumber, thinly sliced (you decide if you want to peel it first)
3/4 c cider vinegar
4 1/2 T sugar (I use brown sugar)
1/2 t salt
Mix it all together. Let it marinate as long as you can stand it. (12-24 hours)