Heat a large pot or Dutch oven over medium heat. Add 2 tbsp olive oil and the chicken breast seasoned with salt and pepper. Lightly brown on both sides. Remove to a plate (will add back with the rice and broth).
Add the remaining 2 tbsp olive oil to the pot. Add the onions, mushrooms, celery, carrots, Italian seasoning, salt, and pepper. Sauté for 4–5 minutes, until vegetables begin to soften.
Add the cayenne, turmeric, garlic, and ginger. Sauté for 1 minute, until fragrant.
Add the rice, chicken broth, water, and browned chicken back to the pot. Bring to a gentle boil, then reduce heat to low, cover, and simmer for 18–22 minutes, or until the rice is tender and the chicken is cooked through.
Remove the chicken to a bowl and shred. Add the shredded chicken back to the soup along with the parsley. Taste for seasoning — additional salt is often needed depending on how salty your broth is.
Squeeze ½ of a fresh lemon into each bowl of soup and enjoy the vitamin C boost!