PREP: Chop onion, carrots, celery and parsnips into ½ inch (1.3 cm) pieces. You will end up with ~ 6-8 cups (800-1200 grams) chopped vegetables. To do this in a food processor: cut vegetables into 2-inch (5 cm) pieces, place in processor bowl and pulse about 3 times. Alternatively, chop with a knife by hand. Cut chicken meat into small pieces, about ½ inch (1.3 cm)
SAUTÉ VEGETABLES: Heat oil (or oil-butter combo) in a large pot on medium-high heat. Add chopped vegetables and garlic. Sauté 2 minutes.
COOK SOUP: Lower heat to medium heat. Stir in 4 tbsp flour and cook 2 minutes, stirring. Add 7 cups water + 4 tbsp chicken bouillon base (or 7 cups broth instead) and a good handful of fresh dill. Stir. Cover and cook 10 minutes.
MAKE DUMPLING DOUGH: While soup is cooking, in a medium bowl, stir together flour, baking powder, dill, and salt until evenly combined. Add melted butter and milk. Stir with a fork into a ball JUST until combined and flour disappears. DON'T overmix. A few lumps are fine.
1 ½ cups all purpose flour, Note 5, 2 ½ teaspoons baking powder, ¾ teaspoons kosher salt, 1 tablespoon finely chopped fresh dill, 3 tablespoons melted butter, ¾ cup milk, any kind
FINISH SOUP AND COOK DUMPLINGS: Remove stems of dill and discard. Stir chopped chicken, cream, and spinach into the broth. bring to a gentle boil, then lower to a steady simmer before dropping in the dough. Pinch off small pieces of dough, about 1½ tablespoons walnut-sized, and add to simmering broth one at a time, spaced out. Cover tightly and cook on medium-low heat (about 4/10) - not boiling - for 18 minutes. Don't lift the lid while dumplings are cooking. They will double in size. When done, test one by cutting it open to make sure it's not doughy inside. If it is, replace the lid and cook the soup and dumplings another few minutes. Gently stir.