Cook your rice noodles according to the package instructions. Drain, rinse, and set aside.
In a large pot over medium heat, add the oil, onion, carrots, and ¼ teaspoon salt. Cook until softened, stirring occasionally, about 5 minutes. Add the ginger, garlic, mushrooms, bell peppers, and remaining ¼ teaspoon salt and cook for 1 more minute, stirring occasionally. Add the curry powder, turmeric, black pepper, and red pepper flakes (if using), and stir constantly for 30 seconds, to toast the spices.
Stir in water, coconut milk, fish sauce, soy sauce, and maple syrup. Bring to a boil over high heat, then reduce the heat to low and simmer for 8 minutes or until vegetables are tender, stirring occasionally.
Stir in the shrimp and kale and cook for 2 more minutes, or until the shrimp is cooked through and kale is wilted, stirring halfway and making sure the shrimp is submerged in the liquid. Stir in the lime juice.
Serve over rice noodles and top with herbs and a squeeze of lime.