Blackberry puree/topping for cheesecake:
Blackberry topping. I use about 200gram of blackberry, about 3 spoon of sugar, 2 spoon of cornstarch, some lemon juice and add some water. I cook the blackberry and add the rest of the ingredient. Begin with small fire and switch to big fire at the end. Let it boil a little. Then sieve the whole mixture to separate the seed. This part need quiet a bit of work.
Next time I would change the steps. I would first blend the blackberry. Sieve it. Can add the sugar, lemon and water while blending or while cooking. Its easier to sieve it first before cooking because the mixture will turn solid and its pretty hard to sieve it as most will get stuck at the sieve. Cornstarch is optional. When the mixture cool, it will become more solid. 200gram is just nice but i may prefer making the topping thicker and can choose to increase it to 300gram blackberry next time.