In a large saucepan over medium heat, combine the coconut milk and red curry paste. Stir well until the paste is dissolved and fragrant.
Pour in the vegetable broth and bring the mixture to a gentle simmer. Stir in the soy sauce and lime juice to enhance the flavor.
Add the sliced mushrooms, carrots, and bell peppers, allowing them to cook for about 5 minutes until they soften.
Meanwhile, cook the ramen noodles according to package instructions. Drain and set aside.
Once the vegetables are cooked, add the baby spinach and let it wilt for about 2-3 minutes. Adjust seasoning by adding fish sauce (if using) and chili flakes to taste.
To serve, place a portion of noodles in a bowl, ladle the curry broth with vegetables over the noodles. Garnish with fresh cilantro and a wedge of lime.
Notes
Fish sauce is optional but adds depth to the flavor.