Add tomato, carrot, beetroot and garlic into a pressure cooker.
Add in salt and water and cover the cooker and put it on medium flame for 5-6 whistles.
Once cooked take a masher or a ladle and mash boiled vegetables thoroughly and then sieve it.
Heat a pan on medium flame. Add in butter, bay leaf and sieved soup and mix it well.
Bring the soup to boil, now add in sugar, ketchup, black pepper and water.
Let soup boil for 2-3 minutes. Now add in corn flour slurry and keep mixing and cook for 1 more minute.