I think you were right to start off small with two handfulls, especially after a case of colic. Now you can start gradually upping it, I like the idea of soaking it (if she will eat it like that) because her tummy might still be sensitive- the extra water will help keep things lubricated and moving, and soaking it takes a step of breaking it down for nutrients so that her poor abused insides can absorb it easily.
You could talk to your vet about adding a fat supplement like ricebran to help with the initial gain.
Good luck! You should take before and after pictures!
Here's a link to a post with some pictures if your interested My new baby