Measure out 3/4 cups purple grape juice into a small, heavy-bottomed saucepan and stir in 1 Tablespoon cornstarch until it's all dissolved and there are no lumps. Add 1/4 cup local honey. Bring to a boil, stirring constantly.
Add 2 cups fresh or frozen Marionberries. Return to a boil and simmer 5 to 10 minutes until fruit is soft.
Serve over warm whole wheat pancakes, waffles or french toast.