2 cups of Fruit
1/4 cup of Granulated Sugar
1/2 cup Cold Water
For every 2 cups of fruit, add 1/4 cup of granulated sugar and 1/2 cup of cold water.
Simmer in a small sauce pan over low heat until soft, about 15 minutes or so, depending on texture of the fruit. Frozen berries will be softer, but still need to cook down to bring out the natural sugars.
Push berries through a fine mesh strainer or cheesecloth to remove seeds over a bowl, mashing with the back of a spoon to extract all liquid.
This should be done ahead in order for it too cool.
You may prepare and freeze in 1/4 cup portions.
Note: One, ten ounce, bag of frozen raspberries or one pint makes about one cup of puree.