°1 liter of fresh blackberries
°2 cups white sugar, or to taste
°2 cups of water
°2 tablespoons of butter
°1 teaspoon of cinnamon
°2 cups flour
°1 teaspoon of salt
°1/4 cup shortening
°1 egg yolk
°5 tablespoons of milk

 Placing blackberries, sugar, water, butter & cinnamon in  saucepan. Cook and stir occasionally over medium heat until they begin to break down and form a sauce, about 20 to 30 minutes.
Meanwhile, whisk together flour and salt in a mixing bowl. Cut shortening with a knife or pastry blender until mixture resembles coarse crumbs. Incorporate the egg yolk into the breadcrumbs. Add the milk one tablespoon at a time, stirring with a fork, until the flour mixture is moistened. Don't add more milk than necessary: ​​when you squeeze a handful of the moistened batter mixture, it should form a ball.
Divide the dough in two and form small balls. Some people like flat dumplings to roll them into a flat circle and cut them into strips, then cut the strips into squares.
Drop dumplings (balls or strips) into the berries. Simmer meatballs, covered, over medium heat for 15 minutes. You can press the dumplings into the juice, but don't stir until they're fully cooked or they'll clump together.

Enjoy !