Put the turmeric and chilli powder in a small bowl, add 2 tablespoons of water and mix together.
Heat the ghee in a heavy-based pan over medium heat, add the cumin, and stir-fry for about 1 minute, or until the seeds begin to splutter. Add the onion and fry for 5 minutes, or until it turns light golden. Add the ginger and garlic pastes and stir-fry for 1 minute, or until all the moisture has evaporated.
Add the turmeric mixture and fry for a further 30 seconds, or until all the liquid has evaporated.
Add the tomato and fry for about 5 minutes, or until all the moisture has evaporated. Now add the chana dal and stir-fry for about 2 minutes, or until the oil separates out.
Add the mashed paneer and stir, then add the chillies and season with salt. Stir-fry for about 1 minute, before adding the ground spices.
Stir, then remove from the heat and adjust the seasoning, if necessary. Transfer to a serving dish and garnish with ginger juliennes and chopped coriander.