Blueberry Conserve - cooking recipe

Ingredients

2 cups water
4 cups sugar
1/3 cup lemon, thinly sliced (about 1/2 large)
1/2 cup orange, thinly sliced (about 1/2 medium)
1/2 cup raisins
1 quart blueberries

Preparation

Bring water and sugar to a boil; add lemon, orange and raisins.
Simmer 5 minutes.
Stir in blueberries.
Cook rapidly until thick, about 30 minutes.
As mixture thickens, stir frequently to prevent sticking.
Ladle hot conserve into hot sterilized jars, leaving 1/4-inch headspace.
Adjust two-piece caps.
Process 15 minutes in a boiling-water canner.
Remove from boiling-water.
Cover with dry towel.
Let stand until caps seal.
Allow to cool completely before moving.