First make the spice paste. Grind the first eight ingredients in a small food processor bowl, adding a couple of tbsps water, into a reasonably smooth paste.
Heat the oil in a largish pan and fry the spice paste on medium heat, stirring all the time u2013 ensuring it doesnu2019t burn, till the raw small of the onion and garlic is no more. Add the vegetablestock, curry leaves, curry powder, the salt and sugar and bring to a boil. Turn down the heat and simmer the broth for about 20 minutes.
While the broth is simmering, cook the noodles in salted water till just done. Drain and keep aside. Put the moong sprouts in salted boiling water for about 30 seconds, drain and refresh in cold water. Drain and keep aside. You can also use the moong sprouts raw like I did, if you prefer.
In the same boiling water, blanch the beans for about 3 minutes and then the carrots for about 30 seconds. Refresh both in cold water, drain and keep aside.
Now fry the tofu cubes. Heat the oil in a wok. Mix the all purpose flour and the cornstarch and toss the tofu cubes in the flour till theyu2019re well coated.
Drop the cubes in the hot oil and fry them till theyu2019re golden brown. Remove and drain on paper towels.
Once the broth is done, turn off the heat and remove the curry leaves and discard. Now add the thick coconut milk and mix well. Do not heat the broth once the coconut milk has been added or it might curdle. If youu2019re planning to serve the soup a little later, do not add the coconut milk. Add it just before you assemble the soup.
For the Chilli Sambhal, heat the oil in a small pan and add the chilli flakes, ginger and garlic pastes. Over medium heat, fry this until the oil surfaces, taking care to see it doesnu2019t burn.
Add the remaining ingredients and mix well. This sambhal is quite spicy and will stay for a couple of weeks, if stored in an airtight container in the fridge.
To serve the laksa, place the noodles in the serving bowls. Put half the sprouts over this and ladle the broth into the bowls. Now add the beans, carrots, remaining sprouts and fried tofu cubes. Garnish with chopped coriander.
Serve with lime wedges for squeezing into the laksa, and chilli sambal on the side.