Very easy - you sew together 5 strips of three fabrics. Then you cut the strip set (or strata) into the wedges. Then you sew the wedges together. Then you applique and circle in the center...sandwich, bind, quilt. Ta! Da!
The only difficult part (after choosing fabrics) is making sure you cut the strips at the 45 degree angle in the correct position on the strata. If you don't it ends up looking like mine - not all the sections meet properly.