Heat oil in a large pot and sauté onions over medium heat. Add garlic, Mango Curry Dip Mix, and ginger and cook for a few minutes. Add chicken and brown it on all sides (if possible). Add red pepper and carrots, and pour in chicken broth and fish sauce. Bring to a boil, then reduce heat, cover, and simmer for 2 hours. (The carrots were really soft so maybe I would only cook this for 1 hour instead.) Add mushrooms and coconut milk and continue simmering for 30 minutes. Stir in lime juice and fresh basil before serving.
Mmmm, that was a good way to warm up when it's -40 outside!