Heat olive in heavy bottom pot or dutch oven. Saute onion until soft and translucent 5-7 minutes. Add celery and carrot. Season well with salt and pepper and cook another 7-8 minutes. Add garlic, bay leaf and fresh thyme.
Add potatoes. Season well with salt and pepper. Stir them frequently for about five minutes, then deglaze the pot with white wine. Let the wine cook off for a few minutes before you pour in the chicken stock. Bring to boil, reduce to simmer and cook 20 minutes until veggies are tender.
Make dumplings: Mix dry ingredients. Blend in bacon fat with a fork until well crumbled. Mix beaten egg into the milk. Add wet ingredients and mix well.
Once veggies are tender add cooked chicken and bring pot back to simmer. Drop in spoonfuls of dumpling dough. Add your peas. Reduce heat to medium low and cover. Cook 12-15 minutes until dumplings are cooked through. Turn off heat and removed lid. Let rest for 10 minutes before serving.