cook the shank in enough water to cover it

simmer for approx. 1hour

when its cooked remove the shank and let the liquid cool

strain the liquid through a strainer

add the washed lentils

wash and dice the veg

add to the soup

simmer gently until the veg is almost cooked adding more water if needed

cut all the fat off the meat, dice it and add it to the soup

check taste before adding any salt