01 -
Wash cherry tomatoes, cucumber, and onion under cold running water. Pat dry. Halve cherry tomatoes, slice cucumber into 1/4-inch rounds, and cut onion into thin half-moons.
02 -
Arrange halved tomatoes, cucumber slices, and onion in a clean quart-size glass jar. Tuck in smashed garlic cloves and dill sprig if using, ensuring ingredients are distributed evenly.
03 -
Combine white vinegar, water, sugar, kosher salt, mustard seeds, and black peppercorns in a small saucepan. Bring to a rolling boil over medium heat, stirring until sugar and salt are fully dissolved.
04 -
Remove saucepan from heat and cool brine for 2-3 minutes. Carefully pour warm brine over vegetables, ensuring all are completely submerged. Press gently to release air pockets if needed.
05 -
Allow filled jar to cool at room temperature for 30 minutes. Seal with tight-fitting lid.
06 -
Place the sealed jar in the refrigerator for at least 4 hours or overnight for deeper flavor. Pickles can be enjoyed up to 2 weeks when stored cold.