Chicken with Rice, Broccoli, and Scallions
- Preheat oven to 350 degrees, with rack in lower third. Pat chicken dry with paper towels and season with salt and pepper. In a large Dutch oven or heavy pot with a tight-fitting lid, heat oil over high. Cook chicken, skin side down, until golden and crisp, 6 minutes. Flip chicken and cook until browned, 6 minutes. Transfer to a large plate.
- Reduce heat to medium and add onion, garlic, and celery to pot. Cook, stirring and scraping up browned bits with a wooden spoon, until onion is translucent, 4 minutes. Stir in mustard, thyme, red-pepper flakes, and rice and cook 1 minute.
- Add broccoli, scallions, and broth and season with salt and pepper. Arrange chicken, skin side up, on top of rice mixture. Bring to a boil, cover pot, and place in oven. Bake until chicken is cooked through and liquid is absorbed, 25 to 30 minutes. Let sit 5 minutes before serving.