Let's kick on with the pickling liquid. In a small pot, pour in the water, vinegar, sugar, salt, peppercorns, and any other spices you want. (Cinnamon stick, star anise, bay leaves). Bring the mixture to a simmer until the salt and sugar has dissolved. Once disolved, remove the pot from the heat and pour the liquid over the beets in the mason jar. Cover and allow to sit for 1 hour.