Removed it by unscrewing 3 screws, connecting the spring to the new hinge, then rescrewing it in with the same 3 screws.
The only thing that might be tricky was holding the spring while attaching it to the new hinge. I tied a strong string to the hooked end before I removed it from the old hinge in case it fell back into the oven body. then I held the spring end with pliers to transfer the spring hook to the new hinge hole.
Very simple job, maybe 5 or ten minutes staring at it, about 3 minutes to actually fix it!