Boil the vegetable stock. 
When choosing the pasta make sure it is the smallest you can find. 
You can buy very small baby pasta (with added iron and vitamins) from Italian delicatessen (by Plasmon), it's worth it but not necessary.
Boil the pasta in the stock (check how long for on the packet instructions, some take as little as 2 mins). 
Put in a baby bowl, add a drizzle of olive oil and some grated parmisan cheese and stir well. 
You can serve it like this or you can  enhance the flavour and the calcium content by adding 1 spreadable cheese triangle
(like Dairylea/Laughing Cow) and mashing it with a fork  mixing it well.