In a large pot, heat olive oil over medium heat. Add chopped onion, carrots, and celery. Sauté until vegetables are softened, about 5-7 minutes.
Stir in the minced garlic and cook for another 1-2 minutes until fragrant.
Pour in the chicken broth and bring the mixture to a boil.
Add the shredded chicken, dried thyme, black pepper, and season with salt to taste. Reduce heat to a simmer and cook for 10 minutes.
Meanwhile, prepare the dumpling dough: In a mixing bowl, combine the flour, baking powder, and salt. Stir in the milk until just combined.
Drop spoonfuls of the dumpling mixture into the simmering soup. Cover the pot and let the dumplings steam on top of the soup for about 15 minutes without lifting the lid.
After 15 minutes, gently stir in the frozen peas and cook for another 5 minutes until the peas are heated through and dumplings are cooked.
Adjust seasoning if necessary, and gently fold in fresh parsley for an added flavor.
Notes
Serve hot in deep bowls and enjoy with crusty bread.