How to Make Jam - NYTimes.com
Geege Schuman stashed this in Yum
What IS jam? Squished fruit?
In the US, the term "jam" refers to a product made of whole fruit cut into pieces or crushed then heated with water and sugar to activate its pectin before being put into containers:
"Jams are usually made from pulp and juice of one fruit, rather than a combination of several fruits. Berries and other small fruits are most frequently used, though larger fruits such as apricots, peaches, or plums cut into small pieces or crushed are also used for jams. Good jam has a soft even consistency without distinct pieces of fruit, a bright color, a good fruit flavor and a semi-jellied texture that is easy to spread but has no free liquid." – Berolzheimer R (ed) et al. (1959)[notes 1]
More on jellies, jams, confits, chutneys, fruit curds and fruit butters (BECAUSE THEY'RE ALL DIFFERENT!) here: