Last strawberry season: How to make strawberry jam?

Strawberry season is here! Hardly anyone can resist the sweet, fruity scent of strawberries. But red berries fail to score with their short shelf life. The classic way to preserve strawberries is to boil them. This preserves the fruity pleasure in your own garden for a long time. We’ll show you how to make your own strawberry jam with just three simple ingredients. Extending the shelf life of the jam The ingredient that provides the shelf life of the jam is sugar. If the fruit-sugar ratio is one-to-one, the jam will last for about a year. To prolong its shelf life, it is best to store the jam in a dark and cool place. However, after opening a jar, put it in the refrigerator. Before filling the jars with jam, you must sterilize it. The less room left for oxygen in the jam jar, the better the shelf life. Therefore, fill your glasses to the brim and close them immediately. Then turn the full glasses upside down for about 10 minutes – this allows the air to escape and any germs left in the lid die.
Source : Blick