In a small bowl, mix the 2 packets of gelatin with 1/2 cup of cold orange juice. Let it rest for 5 minutes until it becomes spongy.

In a saucepan, add the remaining orange juice, the zest, the sugar, and the lemon juice. Cook over medium heat, stirring only until the sugar dissolves.

As soon as it starts to boil, lower the heat and let it simmer for 3-4 minutes. Turn off the heat.

Add the hydrated gelatin to the hot syrup and stir well until completely dissolved. There should be no lumps.

Pour into a small rectangular mold greased with oil or lined with plastic wrap. Let it cool, then refrigerate for 4-6 hours, until firm.

Unmold, cut into small cubes with a lightly greased knife. Roll each cube in granulated sugar to look exactly like the photo.