Heat olive oil in a Dutch oven or heavy pot over medium-high heat.
2 tbsp Olive oil
Brown the chicken thighs on both sides, then remove and set aside.
2 lbs Chicken thighs
In the same pot, melt unsalted butter. Add onion, celery, and carrots, cooking until softened. About 5 minutes.
3 tbsp Unsalted butter, 1 cup Onion, 2 ribs Celery, 3 Carrots
Stir in garlic, bay leaf, sage, and thyme, cooking for an additional minute.
4 cloves Garlic, 1 Bay leaf, 1/4 tsp Sage, 1/2 tsp Thyme
Sprinkle in flour and stir to combine, cooking for two minutes.
3 tbsp Flour
Gradually add chicken stock, stirring continuously.
4 cup Chicken stock
Add potatoes and browned chicken back into the pot.
1 lb Potatoes
Bring to a boil, then reduce to a simmer and partially cover. Cook for 30 minutes.
Stir in heavy cream and continue cooking for 5 minutes.
1/2 cup Heavy cream
If using, stir in fresh parsley.
1/3 cup Fresh parsley
Add frozen green peas, cook for another 5 minutes.
1 cup Frozen green peas
Season with salt and pepper to taste.
1/2 tsp Kosher salt, 1/4 tsp Black pepper
Serve hot.