Slice the onions and in a bowl, mix water rice vinegar and cane sugar. Then put inside the onions. Let them marinade for 10 hours in the fridge.

Drain the liquid. Do not throw away the red onions: you can preserve them with the pickling liquid remained and eat them in salads or garnish your dishes.

Mix the pickling liquid with Agar Agar and bring to 90°. Then put it in a tupper and set in the fridge for 30 mins. Once gellified, blend and filter. Put the gel in a kitchen bottle. Enjoy 🤤