Step 1: Saut Aromatics: Heat olive oil in a large pot or Dutch oven over medium heat. Add the chopped onion and cook until softened, about 5 minutes. Add the minced garlic and cook for another minute until fragrant.
Step 2: Brown Chicken: Add the chicken pieces to the pot and cook until browned on all sides. It does not need to be fully cooked through at this point.
Step 3: Add Rice and Broth: Stir in the rinsed long-grain rice, chicken broth, dried thyme, dried rosemary, salt, and pepper. Ensure the rice is evenly distributed in the pot.
Step 4: Simmer and Cook: Bring the mixture to a boil, then reduce the heat to low, cover the pot tightly, and simmer for 20-25 minutes, or until the rice is cooked through and the chicken is cooked to an internal temperature of 165F (74C). Do not lift the lid during the simmering process to ensure even cooking.
Step 5: Add Vegetables (Optional): If using mixed vegetables, stir them in during the last 5 minutes of cooking. Cover and continue to simmer until the vegetables are heated through.
Step 6: Rest and Garnish: Remove the pot from the heat and let it stand, covered, for 5 minutes to allow the rice to absorb any remaining liquid. Fluff the rice with a fork and garnish with fresh parsley, if desired. Serve hot.
Optional Tips: For a richer flavor, use bone-in, skin-on chicken thighs. Brown the chicken in batches to avoid overcrowding the pot. Substitute brown rice for long-grain rice, but increase the cooking time to 45-50 minutes and add an extra 1/2 cup of broth. For a spicier kick, add a pinch of red pepper flakes along with the other seasonings.