Rinse and hull the strawberries. Cut larger strawberries in half. Blanch the strawberries. Mix the ClearJel starch with the sugar in a large heavy bottomed pot. Add the water or strawberry juice to the pot and whisk until all lumps are gone.
Heat on medium high until the mixture starts to thicken and begins to bubble. Once bubbling add the lemon juice, stirring constantly and remove from the heat. Fold the blanched strawberries into the hot liquid. Add a drop of bright red gel food coloring, if desired.
Fill the jars leaving a 1 inch head space. Remove the bubbles from the jar using a canning bubble remover. Wipe jar rim and place lid on jar. Water bath the jars for 30 minutes. Turn off the heat allow jars to sit for 10 minutes before removing from canner.
Remove jars from canner and place on a towel on the counter. Allow to cool overnight. Label your jars with my free cute printable Strawberry Pie Filling canning labels.