Wash the strawberries, remove the stalk and cut into small pieces. Pluck the basil leaves and chop finely.
Put the jam jars in hot water.
Mix the strawberries with the preserving sugar in a large saucepan and heat while stirring. When the sugar starts to melt, puree the strawberries. Bring to the boil and simmer for 2-3 minutes, stirring continuously.
Remove the jam from the heat, stir in the finely chopped basil and freshly ground pepper.
Take the glasses out of the water, dry them and fill the glasses with the help of a jam funnel. Seal and turn upside down for about 20 minutes.
A delicious, fruity jam with a hint of basil and a slight spiciness.