SUGAR: if using a solid granular sweetener such as sugar or splenda, mix the Clearjel with the 1/4 of solid sweetener. Add to berries in pot. Bring to a boil, stir in remaining sweetener.
LIQUID STEVIA OR HONEY: if using a liquid sweetener such as liquid stevia or honey, stir it directly into the berry mixture. Stir in the Clearjel one tablespoon at a time, mixing thoroughly after each addition.
Regardless of sweetener method, now bring the mixture to a boil and boil for 1 minute, stirring non-stop.
Remove from heat.
Ladle into quarter-litre (1/2 US pint / 8 oz) jars.
Leave 2 cm (1/2 inch) headspace.
Debubble, adjust headspace.
Wipe jar rims.
Put lids on.
Process in a water bath or steam canner.
Process either size jars for 10 minutes; increase time as needed for your altitude.