Put the raspberries in a small saucepan and cook on low heat for about 10 minutes, stirring occasionally.
As the berries heat up and cook, they will become softer, so squeeze them with a fork until you get a puree-like mixtureThen add chia seeds and lemon juice into the fruit and stir nicely to combine.Leave on a medium heat for another 15 minutes, until you get a jelly-like mixture. Transfer into a glass jar, let it cool and place in the refrigerator.This healthy jam can stay in the fridge for 6-7 days, and in the freezer for much longer.