Peel the oranges, removing as much of the white pith as possible for a sweeter flavour.
Cut the oranges in 4, and place the oranges into the Thermomix bowl and blend for 30 sec / Sp 10, or until completely smooth.
Taste and add your preferred sweetener if desired. Mix 5 sec / Sp 4.
In a small bowl, sprinkle the gelatine over 2–3 tablespoons of cold water (or a little of the orange purée). Leave for 5 minutes to bloom.
Meanwhile, gently heat the orange purée for 1 min / 50°C / Sp 2.
Add the bloomed gelatine to the Thermomix bowl and mix 30 sec / 50°C / Sp 3 until completely dissolved.
Pour the mixture into silicone gummy moulds, a muesli bar mould, or a shallow container.
Refrigerate for 2–4 hours, or until completely firm.
Remove from the moulds, or cut into bite-sized squares if using a shallow container.
Store in an airtight container in the refrigerator.