Thoroughly wash your apricots and slice them into quarters. Be sure to remove their pits.
On medium to low heat, add the apricots to your saucepan along with the water, sugar, vanilla and lemon juice. Bring to a boil, then turn the heat down to low.
Simmer for about 25 minutes, or until the mixture is thickened and the fruit has burst.
Pour into your mason jar and let it come to room temperature before placing it in the fridge. You can enjoy right away, or let it set overnight in the fridge to thicken a bit more.