How best to add additional NICs for additional virtual switches on a working hyper-v cluster (HA)?

So we have a working hyper-v cluster but want to add additional NICs to the nodes to create additional virtual switches.

Do we need to destroy the cluster via cluster manager and recreate when we have additional nodes in place or is there are less instrusive method to add additional NICs for virtual switches?

Please provide recommended steps on how best to do this?

Thanks.

dsk