variety of homemade jams in glass jars - Stephaniefrey/Getty Images Fresh fruit is a natural treat, but when it's converted into a spreadable, sweet-tart jam, there's almost nothing it can't do.

Many cooks have a bit of trepidation about canning. And with good cause — canned low-acid foods such as vegetables, meats and some tomatoes can harbor harmful organisms if not processed properly. But ...

Jelly, jam, and preserves are all types of fruit spreads made from heating pectin, sugar, and acid. Jelly is made from fruit juice and has a firmer gel and a smooth texture. Jams and preserves are ...