To make the brine, combine the vinegar, sugar and salt in a small saucepan and heat until dissolved. Once dissolved, remove from the heat and add the water. Pour the brine into a bowl or jar and cover. Place in the refrigerator until cool or overnight. I put my brine in a large mason jar, overnight.
Slice your cucumbers into spears or rounds. I did spears and had brine leftover so then cut rounds with the rest of my cucumber.
Thinly slice the garlic, red onion and jalapeno (optional)
Next, I poured the cold brine into another jar so my jar for the pickles would be chilled.
Put the Peppercorns, Mustard Seeds, Garlic, Onion, Dill and Jalapeno in the jar. I put 3/4 of the ingredients on the bottom and saved some for the top and sides, in-between the cucumber spears.
Place the spears or rounds in the jar (they should fit in tight)
Place the rest of onion, garlic, mustard seeds, peppercorns, dill and jalapeno in the jar.
Pour the brine in the jar all the way to the top.
Cover tightly and put in the refrigerator for at least 24 hours or more so they are crunchy.