Hard boil 12 eggs, then cool and peel
Make pickling liquid: in a sauce pan, combine vinegar, water, sugar, bay leaves, and black peppercorns. Bring to a boil, then allow to simmer for 5 minutes. Remove from heat and allow pickling liquid to cool.
In a large jar (or 2 smaller jars), drain the beet juice and add to jar. If using whole beets, half or quarter the beets.
Add layers of peeled hard boiled eggs, beets, and red onion to jar(s).
When pickling liquid has cooled, fill jars with pickling liquid. Give jars a little swirl to combine beet juice with pickling liquid.
Place in refrigerator for 2-3 days.
Red beet eggs are ready to eat after 2-3 days. These delicious eggs will last in the refrigerator for up to 3 months.