I bought a flat of raspberries from my favourite farmer, Dan. What I do, is rather than mash the berries, I buzz them up to a thick liquid. I got enough to make four batches of jam. I put each batch in a freezer bag with the amount, the date and Raspberry written with a Sharpie. Then I can make the jam at my leisure. For the first time, I have blended them in the Vitamix. My jam has always been more like jelly than jam except for the little seeds. I am hoping that the Vitamix pulverized the seeds too. I will report back.