Heat the oil in a large skillet over medium heat. When the oil shimmers, add the chicken. Season with black pepper and brown all over, breaking the chicken up as it cooks, about 5 minutes. Add the garlic, ginger, peppers, and cashews, cook another 2-3 minutes, until the garlic is fragrant. Pour in the soy sauce, fish sauce, chili paste, and honey. Bring the sauce to a boil over medium-high heat and cook until the sauce coats the chicken, about 5-8 minutes. Remove from the heat and stir in the basil and mint.Serve the chicken and sauce over bowls of rice. Top with mangos and additional basil. Enjoy!