Blueberry Cassis Preserves - cooking recipe

Ingredients

2 pints fresh blueberries
1 lemon, juice of
4 cups sugar
1/2 cup creme de cassis
1/2 teaspoon ground allspice (or 1 tsp allspice berries)

Preparation

Pick over blueberries, removing all stems, leaves and damaged or unfit berries. Wash and place in a preserving pan with the lemon juice (and whole allspice, if using).
Cook over medium heat until berries begin to soften (3--5 minutes). Add sugar and bring to a boil. Cook for 10 minutes, stirring often.
Mix in the cassis and allspice (if using ground). Cook for 5 more minutes, until preserve is thickened and reaches 221\u00b0F.
Ladle preserve into hot sterilized jars, leaving 1/2 inch headroom. Wipe rims clean and seal.
Process 5 minutes in a boiling water bath. Cool, check seals, and alabel. Store for up to 1 year in a cool dark place.