How do I create a view :One to many relationship with nothing on the "many" side

How do I create a view :One to many relationship with nothing on the "many" side

How would create a list (view) of one to many relationships where "the one " exists but there is no matching "many"? 

An example of what I am trying to ask ( but doing poorly ) would be to create a view that shows all projects where there are no tasks created.  

In this example, the tasks table ( form ) would hold a field for projectID which would hold the relationship.

thanks in advance