You may be asking what’s in relish? Well, for the most part- cucumbers, onions, vinegar, sugar, and spices. Basically, think about your sweet pickles, but all chopped up into tiny pieces and that’s what relish is. So if you’ve ever made your own pickles, you can make relish!
Homemade sweet pickle relish recipe: https://thefreerangelife.com/easy-pickle-relish/