I would also like to have this functionality within Asana's interface.
Although, actually, I do know a way to get the project list. You will have to use Asana's API.
If I use this:
I get a list of all projects in our organization which are visible to me.
You just need to replace 100208324844084 with your own workspace.
If you don't know your workspace ID, you can get it using this:
This will show you a list of all your workspaces.
I hope this helps.
Oh and, the result is not that pretty since it's in JSON format.
You can use this site (https://konklone.io/json/) to convert the result into CSV, which is a much readable format.