Fortigate 200F with Cisco Nexus - redundancy

hello all,

I have two Nexus 9000 switches connected via a vPC Peer Link. Two catalyst stacks are also connected to both NX's via vPC's. How can I be able to have redundant paths between the fortigate and the NX's? Do I set up a "hardware switch" with two ports on the Fortigate.. and then run one cable to NX1 and one to NX2? Do I need to vPC those? 

Obvious goal being if one of the NX goes down.. traffic will still go over the other one. 

Thanks! Happy to provide more details if needed.