Heat a large Dutch oven over medium-high heat and add the olive oil. Once hot, saute the onions, carrots, celery, and garlic for about 3-4 minutes. Add the chopped fresh herbs, grated ginger, and ground turmeric, and saute 30 seconds more.
Pour in the bone broth and add the red pepper, salt, pepper, and chicken breasts.
Bring to a boil, and add the couscous. Reduce the heat and simmer for 20 minutes or until the chicken is cooked through and the couscous is tender.
Remove the chicken breasts from the soup, shred them, and return to the pot. Add the frozen peas, simmer for one more minute, remove from heat, and serve with a squeeze of lemon juice on top.