01 -
Wash a 1-pint heat-safe jar and lid in hot soapy water, rinse well, and set aside on a clean towel.
02 -
Bring 4 cups of water to a boil. Add the peeled garlic cloves and boil for 60 seconds, then drain well.
03 -
In the same saucepan, combine vinegar, water, sugar, salt, mustard seeds, red pepper flakes, cayenne, thyme, bay leaf, and the optional chile. Bring to a simmer and cook for 2 minutes, stirring until the sugar and salt dissolve.
04 -
Add the blanched garlic to the simmering brine and cook for 1 minute. Use a clean spoon to transfer the garlic and chile to the jar.
05 -
Pour the hot brine over the garlic until the cloves are fully submerged. Tap the jar gently to release air bubbles.
06 -
Let the jar cool for about 30 minutes, then cover and refrigerate. Chill for at least 5 days before eating, and use within 1 month.