Grind the cucumbers, onions, and peppers in a grinder. Let most of the water run off. Put in a large stock pot and simmer for 30-45 minutes until most of the liquid has evaporated. Add vinegar, sugar and all spices and simmer until you have the consistency you like. I like a thicker relish so I simmer mine about an hour at least.
Have your jars in hot water and simmer your flat seals. Fill the jars and wipe off the rim. Place on the seals and rings and place on a towel to cool. They do not need to be water bathed. I have tried making it by running the veggies through a shredder but I like the consistency better if they are ground up. I hope you like it. My family is spoiled by this relish. I never buy any store brand. The aroma in my kitchen is wonderful.
You can also pack this relish in small pickle jars. Any glass jar that has the rubber seal works. In a pinch when I've used all my canning jars for other things, I've used spaghetti sauce jars too.