In a small pot, combine the vinegar, water, sugar, salt, and pickling spice. Place it on the stove over medium heat and bring to a boil, stirring to make sure the sugar dissolves.
Take the pot off the heat and add in the garlic and bay leaves. Leave the liquid to cool.
Place all of your peeled eggs into a large clean jar.
Stuff in the onions or other flavoring of your choice.
Pour in the pickling liquid and spices and seal the jar. Place in the fridge for a minimum of 2 days before eating.