Heat oil in a pot over medium heat. Sauté onion for 3-4 minutes.
Add garlic, ginger, and curry paste; cook for 1-2 minutes.
Stir in coconut milk, broth, fish sauce, soy sauce, and sugar. Simmer.
Add bell pepper, mushrooms, and snap peas; cook for 5-7 minutes.
Add dumplings; cook for 5-7 minutes until done.
Stir in lime juice, adjust seasoning, and garnish with herbs.