In a large pot, heat the vegetable oil over medium heat. Add the diced onion and sauté until translucent, about 5 minutes.
Stir in the minced garlic and ginger, cooking for an additional 1-2 minutes until fragrant.
Add the red curry paste and stir well to combine, cooking for another minute.
Pour in the vegetable broth and coconut milk, stirring to mix everything together. Bring the mixture to a gentle simmer.
Add the soy sauce, lime juice, and frozen mixed vegetables to the pot, stirring to combine. Let it simmer for 5 minutes.
Gently add the frozen dumplings to the soup, ensuring they are submerged. Cook according to package instructions, usually about 5-7 minutes.
Once the dumplings are cooked through, remove the pot from heat. Taste and adjust seasoning if necessary.
Serve hot, garnished with fresh cilantro and lime wedges on the side.