1) Take a look at the method for creating a dynamic navmesh. If the minotaur will be chasing the player you will need it:
2) When the level loads, do the following:
a) Gen the nav mesh
b) Create a waypoint route for wandering
c) Instantiate the AI from its prefab
d) Assign the waypoint route into the AI memory as homePatrolRoute
3) Make sure the player is tagged appropriately with a creature aspect, and that the Minotaur alignment and aggressiveness are set so that he’ll attack.
That should be it.