
Bright, tangy, and packed with garden-fresh crunch, this homemade relish is the kind of condiment that makes everything it touches taste better — from grilled hot dogs to a simple cheese sandwich. The ingredient list is refreshingly straightforward: cucumbers, bell peppers, onion, vinegar, sugar, and a handful of warm spices that give it that unmistakable classic flavor. Mustard seed, celery seed, and a touch of turmeric bring depth and a gorgeous golden hue without relying on any legume-derived ingredients, which can sneak into store-bought versions through additives or shared processing lines. The salting step is key — it draws out excess moisture so the finished relish has real body and doesn't turn watery in the jar. A quick simmer in the sweet-and-sour brine lets everything meld together while keeping just enough texture to make each bite satisfying. Spooned into sterilized jars and tucked into the fridge, it keeps beautifully and tastes even better after a day or two once the flavors have had time to settle in.
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Combine the chopped cucumbers, onion, and both bell peppers in a large mixing bowl. Sprinkle the kosher salt over the vegetables and toss to coat. Let stand at room temperature for 1 hour, until the vegetables have released a significant amount of liquid.
Transfer the salted vegetables to a colander and rinse thoroughly under cold running water. Press firmly with your hands or the back of a spoon to squeeze out as much liquid as possible — the vegetables should feel noticeably drier.
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