Heat olive oil in a saucepan over medium-high heat, Once the oil is hot, add ginger, garlic, green chilies, and saute for 30 secs.
Next, add onions and saute till they turn translucent.
Add mixed vegetables, saute for 2 minutes until the veggies are tender, and then add vegetable stock (or water), salt, and black pepper and bring it to boil.
In a small mixing bowl, combine 1 tablespoon of cornflour along with ¼ cup of water until there are no lumps.
Add the cornflour slurry and bring the soup to a rolling boil. The soup would thicken a bit. At this stage turn off the gas flame.
Then add the lime juice and coriander (cilantro) and mix well. Adjust seasoning at this stage.
Serve Vegetable Lemon Coriander Clear Soup piping hot.