Mock Cathedral Window

[K. McEuen]

So, how does one make the "mock" version of cathedral windows?
I saw the Moda tutorial. I am assuming (correct me if I am wrong) that shows the true cathedral windows.

Nope, the Moda one is a mock cathedral window as well.

The traditional cathedral window is all done with folded fabric squares and hand sewn, not with circles.

Here is a tutorial for the traditional version http://www.instructables.com/id/Cath...Quilt-Squares/