Create a manual outgoing filter
Never mind the condition
As action you set export to file (plain text)
file name something like c:\temp\exportlist.txt
option: append to existing file
use the template:
%Date, %Subj
In case you need the subject with prefixes (like Re: and Fwd:) make the template:
%Date, %FullSubj
Open the txt file with Excel and tell Excel that it's a CSV file with the comma as separator
Good luck

There is an export command, but that doesn't what you want as it exports complete messages.

You create a filter via the menu:
Account -> Sorting Office/Filters -> select 'outgoing mail' -> File -> New filter
Now you create a filter with the actions I proposed
Afterwards at the 'options' tab you select 'this filter is active' (should be on by default) and 'use this filter for manual refiltering only'
Now you press the OK button.

Next you select your 'sent mail' folder and via the menu you pick:
Folder -> Re-Filter
Now a pop-up appears and you enable 'outgoing mail' and 'manual filters only',  nothing else. Press OK and the re-filtering starts.

BTW The description of the filter says that it's c:\temp\exportlist.txt, that means that you've got to have a directory C:\temp in case you haven't got that now (and that's not unlikely) you need to create one before you run the filter.