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I think the following will work:
```ses_DomainIdentityVerification:
    type: aws:ses:DomainIdentityVerification
    properties:
      domain:
        fn::invoke:
          function: str:trimPrefix
          arguments:
            # arguments dictionary
            prefix: "production." # the prefix to trim
            string: "${ses_DomainIdentity.id}" # the string from which to trim it
          result: result```
`result` in an fn block lets you set which field of the result to return rather than the overall result object.

<@U02J3T6A8LB> wow! Thank you. Was this somewhere in the documentation? Because I sure didn't see it when I was looking

Yup, at <https://www.pulumi.com/docs/reference/yaml/#fninvoke>
Hopefully some other useful bits on that page as well

I note this is specific to `fn::invoke` which might have made it a bit less obvious to find

<@U02J3T6A8LB> Thanks again. It's obvious now that you pointed it out. I think my brain passed over that bit because it didn't have 'result' anywhere in it.