A grandma blueberry jam is a preparation based on blueberries, sugar and water.
Blueberries are small, purplish-blue berries with a mild, slightly sweet flavor, light in sugars and calories, high in fiber and antioxidants, and very diuretic.
Blueberry pie is a traditional seasonal dessert in the mountainous regions of Central Europe. Blueberry muffin is a North American baking classic. Blueberries are also used to make jams, syrups, sorbets, herbal teas, brandies, liqueurs or wines.
Easy to prepare, sweet and delicious, this jam is perfect for snacks or as an ingredient in pies, muffins or cakes.

Preparation :

• Sort and wash the blueberries in cold water.
• Pour the water and sugar into a Dutch oven.
• Bring to a boil while stirring, then continue to boil gently for 5 min.
• Add the blueberries, bring to a boil and simmer gently for about 1 h to 1 h 15 min.
• Stir often and prevent the jam from sticking to the bottom.
• Sterilize the jam jars.
• Check the consistency by pouring a drop of jam on a plate taken out of the freezer.
• If the drop freezes, the jam is ready.
• Fill the jars with jams, close and turn over.
• Let cool and enjoy or store in a cool, dry place.