Bellow you can find the steps that you need to follow to have some yummy fruit jellies:
Step 1 – Wash some oranges, limes and lemons (you can use also grapefruit) and slice them into halves
Step 2 – Remove all the pulps from inside this fruits until only skin remains
Step 3 – Fill these fruit skins with prepared jelly. To prepare jelly follow the instructions on the packaging
Step 4 – Put them in the fridge
Step 5 – After hardening, slice them into wedges
Source: Praktic Ideas