In a medium saucepan, mix together vinegar, water, sugar, black peppercorns, mustard seeds, coriander seeds and salt.
Bring to a boil and remove from heat once sugar has fully dissolved.
Fill in the clean and sanitized 1 quart glass jar with egg.
Tuck in sliced jalapeno, and garlic in jar.
Pour the brine over the eggs and top jar with a lid.
Store jarred, jalapeno pickled eggs in the refrigerator.
These are best enjoyed during the first 2 weeks but will keep safely for up to 1 month in the fridge.