Creating this incredible Cozy One-Pot Chicken Stew with Fluffy Sourdough Dumplings is easy when you follow these steps:

1. Heat Oil: In a large pot, heat the olive oil over medium heat.
2. Sauté Vegetables: Add the diced onion, garlic, carrots, and celery. Sauté for about 5 minutes until softened.
3. Brown Chicken: Add the chicken pieces to the pot. Cook until browned on all sides, about 5-7 minutes.
4. Add Broth and Veggies: Pour in the chicken broth and add the diced potatoes, thyme, rosemary, bay leaf, salt, and pepper. Stir well to combine.
5. Simmer: Bring the mixture to a boil, then reduce the heat to low. Cover and let it simmer for 30 minutes, allowing the flavors to meld.
6. Prepare Dumpling Mixture: In a separate bowl, combine the sourdough starter, flour, baking powder, milk, and salt. Mix until just combined; do not overmix.
7. Add Peas to Stew: After 30 minutes, stir the frozen peas into the stew.
8. Add Dumplings: Drop spoonfuls of the dumpling mixture on top of the simmering stew. Cover immediately and cook for an additional 15 minutes without lifting the lid.
9. Check Dumplings: After 15 minutes, check that the dumplings are cooked through and fluffy.
10. Serve: Remove the bay leaf and ladle the stew into bowls. Garnish with chopped parsley before serving.

These steps will guide you in creating this delightful dish effortlessly.