My grandma used to make this version of chicken “noodle” soup. Chicken is simmered in a rich, hearty broth along with carrots, onions and celery then simple dumplings (aka “slides”) are added. They help thicken the soup as well as add flavor and texture.
Heat a 6-quart Dutch oven or stock pot over medium heat. Drizzle in the olive oil (enough to coat the bottom) and add the onion, celery, carrots, garlic, rosemary and thyme. Cook, stirring occasionally, until the veggies begin to soften, 5 to 6 minutes. Liberally season with salt and pepper. Add the chicken, stock and bay leaves. Stir, bring to a simmer then cover and cook over low heat for 35 minutes, stirring occasionally.
In a small bowl, whisk together the flour, baking powder, baking soda, 1/4 teaspoon salt, 1/4 teaspoon pepper and nutmeg. In another small bowl, whisk together the egg and 1/4 cup water, then add to the flour mixture and whisk together until smooth.
Make sure the soup is at a gentle simmer, then using a 1/2 teaspoon measure, scoop some of the batter, then slide it off with your finger into the soup. Make 5 or 6 dumplings at a time, let cook for 20 seconds, then stir and add another batch. You should have enough batter for 25 to 30 slides. Cook for 5 minutes longer, gently stirring, then ladle into bowls and top with torn parsley and pepper.