Heat butter in a cooker, add in bay leaf and garlic, saute for a min.
Add in onions and saute for another min.
Add in beetroot and tomatoes. Saute for 2 mins.
Add in salt, sugar and mix well. Add in water. Cover and pressure cook for 2 whistle. Simmer the cooker for 5 mins. Turn off the heat and let the steam escape all by itself.
Now open the cooker, remove the bay leaf.
Use a hand blender to puree the soup. If you don't have hand blender, cool the mix then puree the soup in a blender.
Pour the pureed soup through a sieve and sieve well.
Mix cornflour with milk and set aside.
Now pour the soup in a sauce pan, add pepper, tomato ketchup and cornflour milk. Boil once.
Remove and serve hot with some croutons.
For Croutons.
Cut bread slices into small squares.
Heat oil in a tawa and place the cut bread slices in oil and fry till golden on both sides. Remove to a plate and set aside