Preheat oven to 375 f.
Heat a large oven-safe pot/skillet over medium. Add oil and the garlic cloves, cook until golden. Stir in the mushrooms and carrots. Stir, and cook for a few more minutes.
Add the chicken and sprinkle with the sea salt. Pour in the stock/broth and bring to a simmer for about 5 minutes.
Add the bell peppers, onion, bay leaves, rosemary, red pepper flakes, and tomatoes to the pot. Bring to a simmer and cover.
Transfer to preheated oven, and let cook for about an hour - until chicken is falling off the bone, and tender.