Watermelon wash, peel from the peel and seeds, leaving only the sweet pulp.
Watermelon pulp slice them into cubes of medium size, put in a saucepan and pour sugar. Leave the watermelon with the sugar for two hours, to drain juice.
Put the pan with the watermelon on medium heat and boil it, stirring gently with a wooden spatula, for 15 minutes. Then leave to cool.
Again put jam watermelon on the fire for 15 minutes and leave to cool. Repeat the procedure three times.
During the last cooking add in jam watermelon vanilla sugar, citric acid, provari after that another 5 minutes and remove from heat. Jam is ready. It only remained to cool.