In large saucepan with lid, heat fresh or frozen berries, dried blueberries, spices, lemon juice & zest and the water; bring to a low boil and simmer until the mixture cooks down by ¼.
In a mixing bowl, prepare the dumplings. Sift the flour, baking powder, salt and sugar. Grate in frozen butter and enough milk until it makes a pliable dumpling dough that you can spoon. Do not over mix. Drop by tablespoonfuls into hot mixture & cover. Simmer for 15 minutes without taking the lid off. Dumplings should be puffed up and cooked through.
Transfer to serving dish and serve immediately.