Heat coconut oil in a large pot over medium heat. Sauté diced onion for 5 minutes until translucent.
Stir in minced garlic and grated ginger. Cook for an additional 1-2 minutes.
Add rinsed red lentils and red curry paste. Stir and allow flavors to meld for 1 minute.
Pour in vegetable broth and coconut milk. Add soy sauce, salt, and black pepper. Stir well.
Bring to a boil, then reduce heat to low and let simmer for 25-30 minutes until lentils are tender.
Blend the soup for a creamier texture if desired. Stir in lime juice after blending.
Serve in bowls, garnished with chopped cilantro and lime wedges.