Make this recipe a recipe that people in that category can eat. categories: ['low_calorie'], recipe: combine blackberries and sugar in a pot over medium heat. bring to a simmer. strain seeds if desired, then return juice to pot, reserving 1 tbsp of juice in a small bowl. add the cornstarch to the reserved juice (make sure the juice has cooled down first). blend completely. add cornstarch mixture to juice; bring to a boil. stir frequently, until jam is thickened, about 15 minutes. remove from heat and stir in lemon juice.

Target recipe: crush blackberries in a large kettle. add water and bring to a boil. reduce heat to medium and cook for 10 minutes. strain through jelly bag, reserving juice and discarding pulp. add water to juice if necessary to equal 2 quarts. pour into large kettle. slowly stir in sugar until dissolved. place spices in a cheesecloth bag; add to juice. simmer, uncovered, for 30 minutes. bring to a boil; remove the spice bag and discard. pour hot into hot jars, leaving ¼-inch headspace. adjust caps. process for 15 minutes in a boiling water bath. to serve, mix about one-third concentrate to two-thirds soda.