I think hydrolysis.

In hot water it forms colloidal solution.

First reaction is hydrophlic reaction attraction of hydroxyl groups to hydrogen atoms and then creating new hydrogen bond  disassociate starch strands.....

then in activate invertases, amylases types through activating GAs ..... and finally alteration of free water into structural water rendering ploymer starch into simple, di, tri, and oligo saccharides by process called hydrolysis.... and finally bounding sugars to negate their charge, translocating them across cellular membrane to glyclysis and cribs to produce energy for growing embryo axis