Chop your favorite fiery red peppers in the food processor along with an onion, then stir in a sugar-and-apple cider vinegar solution for a tangy, spicy condiment that will amp up mayo, burger patties, deviled eggs, you name it.
Combine peppers, onion, and 2 teaspoons salt in a food processor; pulse until finely chopped. Transfer mixture to a sieve set over a bowl and let stand 30 minutes. Run under cold water for a few seconds to remove excess salt, then thoroughly drain.
In a small saucepan, bring vinegar and sugar to a boil, stirring until sugar has dissolved. Remove from heat; stir in pepper mixture. Let cool completely. Transfer to resealable jars with lids. Cover and refrigerate at least 3 days and up to 1 month, or follow our canning instructions and store at room temperature up to 1 year.