Rinse the kumquat clean with running water.

Cut four vertical slits on each kumquat surface.

In a pot, place kumquat and enough water (not included in the list) to cover and bring it to a boil.

Turn off the heat when the film is formed, strain with a colander, and wash the fruits with running water.

Return the kumquat to the pot. Add water just enough to cover, granulated sugar, and TREHA^® and bring it to a boil.

Turn off the heat when the fruit becomes soft. Add lemon juice and let it cool.