Preparation Bring vinegar, sugar, salt, and garlic to a simmer in a small saucepan over medium-high heat, stirring to dissolve sugar and salt. Pour brine into a small heatproof jar or bowl, add chiles, and let cool. Do Ahead: Chiles can be pickled 1 month ahead. Cover and chill.
Preparation Bring vinegar, sugar, salt, and garlic to a simmer in a small saucepan over medium-high heat, stirring to dissolve sugar and salt. Pour brine into a small heatproof jar or bowl, add chiles, and let cool. Do Ahead: Chiles can be pickled 1 month ahead. Cover and chill.