Put berries in a small saucepan.
Add sugar (or sweetener) and lemon juice. Cook on high just until the mixture starts
to
boil. Reduce heat to medium and mash the berries with a spatula, stirring frequently
to
keep from burning or sticking to the bottom of the pan.
After about 15 minutes, most of the
liquid should be cooked off. When you reach your desired consistency, let it cool
and
pour into a container to refrigerate for up to 1 week.