Oranges from Dennis' yard.
Sliver 2 oranges and mix with 2 cups of orange juice. Let sit in fridge overnight or for 24 hours.
Add ~2 cups sugar, mix. Low boil / hard simmer until reduce by half (104c), takes about 30 minutes. Test thickening on frozen plate.

Store in clean jars in fridge for 3 weeks or freezer for 6 months.