I'm from the mountains of Western North Carolina and one of my very favorite breakfasts was thickened blackberries. We picked blackberries every summer, froze them and used them for thickened blackberries for breakfast. Simply
take frozen blackberries out of freezer, put into pot, barely covering bottom with water, cook about 3-5 minutes, add sugar to taste, cornstarch to thicken, serve on hot biscuits with butter-----WONDERFUL!!!!!!