Transfer the vinegar to a small saucepan and bring it to a gentle simmer over medium-high heat. Once the vinegar is simmering, remove the saucepan from the heat and add the cauliflower, cloves, ginger, cinnamon, star anise, seeds, black peppercorns, and agave. Set aside for 10 minutes.
Transfer to a glass container with a tight-fitting lid and add water to cover the cauliflower.
Poke the red chili pepper with a fork (if using), to better infuse the flavor. Place the pepper inside the jar.
Refrigerate Quick Pickled Cauliflower.
Notes
Chop the florets for serving and add them to veggie bowls, salads, chilis, soups, or stews for a tang to reduce the need for salt.