I came across a picture of a quilt I made about 15 years ago, which I also had published in a magazine. I forgot about it (what? how can I forget a quilt, you say? I've had hundreds published, so my brain is leaking by now)
I also realized I wrote a tutorial about this technique a few summers ago. Here is the quilt:
Garden Maze Quilt
And here's a tutorial using some Windham Fabrics from designer Nancy Gere. I have step by step pictures on how to make those criss-cross corner blocks using NO TEMPLATES. Can you believe it?