Step 1: Prepare the Vegetables: Preheat oven to 400F (200C). In a large bowl, toss the chopped onion, carrots, celery, and potatoes with olive oil, salt, and pepper.
Step 2: Sear the Chicken: Heat a large oven-safe skillet or Dutch oven over medium-high heat. Add the chicken pieces and sear on all sides until lightly browned. This step adds depth of flavor to the final dish. Remove the chicken from the skillet and set aside.
Step 3: Saut Aromatics: Add the minced garlic to the skillet and saut for about 30 seconds, until fragrant. Be careful not to burn the garlic.
Step 4: Combine Ingredients: Add the tossed vegetables to the skillet and spread them in an even layer. Place the seared chicken pieces on top of the vegetables.
Step 5: Add Broth and Seasonings: Pour the chicken broth over the chicken and vegetables. Add the dried thyme, dried rosemary, and bay leaf. Season with additional salt and pepper to taste.
Step 6: Bake: Bring the mixture to a simmer on the stovetop, then transfer the skillet or Dutch oven to the preheated oven. Bake for 30-40 minutes, or until the chicken is cooked through and the vegetables are tender. The internal temperature of the chicken should reach 165F (74C).
Step 7: Finish and Serve: Remove the skillet from the oven and discard the bay leaf. If using, stir in the frozen peas during the last 5 minutes of cooking. Garnish with fresh parsley, if desired, before serving.
Optional Tips: For a creamier dish, stir in 1/4 cup of heavy cream or sour cream after removing from the oven. To add more color and flavor, include other vegetables like mushrooms, bell peppers, or zucchini. Chicken breasts can be used instead of chicken thighs, but may require a shorter cooking time. For gluten-free dietary needs, make sure chicken broth is gluten-free certified.