In a large pot, heat the coconut oil over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes.
Stir in the minced garlic and grated ginger; cook for an additional minute until fragrant.
Add the red curry paste to the pot and cook, stirring constantly, for about 2 minutes to enhance its flavor.
Pour in the coconut milk and vegetable broth, then add the soy sauce, lime juice, and brown sugar. Stir well to combine.
Bring the mixture to a gentle simmer.
Add the rice noodles and cook according to the package instructions, usually about 4-6 minutes.
In the last 2 minutes of cooking, add the snap peas, sliced red bell pepper, and baby spinach to the pot. Stir to combine and cook until the vegetables are just tender.
Taste and adjust seasoning if necessary, adding more lime juice or soy sauce to your preference.
Serve hot, garnished with fresh cilantro and lime wedges on the side.
Notes
Adjust seasoning to taste with lime juice or soy sauce.