In a large skillet over medium heat, add the olive oil. Sauté the onions, carrots, and celery until softened, about 5 minutes.
Add the minced garlic, dried thyme, rosemary, salt, and pepper to the skillet, cooking for another minute until fragrant.
Transfer the sautéed vegetables and spices to the slow cooker. Add the diced chicken and frozen peas.
Pour in the chicken broth and heavy cream, stirring gently to combine all ingredients thoroughly.
Cover the slow cooker and cook on low for 6-7 hours or on high for 3-4 hours, until the chicken is cooked through and tender.
About 30 minutes before serving, open the slow cooker and dollop the biscuit dough on top of the mixture, covering it a bit. Close the lid and let the dough steam and cook until fluffy and golden (approximately 30 minutes on high heat).
Once the biscuits are done, check the chicken for seasoning, adding more salt and pepper as needed. Stir gently to combine the biscuits into the filling, or serve them on top.
Notes
Serve in bowls with fresh parsley for garnish and extra biscuit pieces on the side.
Keyword chicken, comfort food, pot pie, slow cooker