Mixed Berry Jam - cooking recipe

Ingredients

14 oz frozen raspberries
10.5 oz frozen blackberries
10.5 oz frozen blueberries
1/2 cup lemon juice
4 1/2 cups sugar

Preparation

Bring berries, 2 cups water and lemon juice to a boil. Reduce heat and simmer for 20 mins.
Add sugar and stir over medium heat until sugar dissolves. Bring to a boil. Boil, stirring occasionally, for 15 mins, or until jam sets (when a teaspoon of jam placed on a chilled plate wrinkles when touched).