If you are not familiar with the Build a Seam (BAS) Challenge, briefly, every week or two I post a picture of the basic bare bones of a seam treatment or a new stitch, and we have a week to decide on and complete whatever other stitches and embellishments are needed to make it a complete - and gorgeous! - seam treatment. I am really enjoying training myself to see beyond the basic herringbone or cretan stitch I like to fall back on, and to learn to make more passes across the seam adding more stitches, beads. SRE, etc. - I hope you do too! There is a list of the stitches with links to the original posts for each on the right hand side of my blog here. Feel free to jump in anytime!
So, without further ado, here is a tutorial for Build a Seam (BAS) #76, called Plaited Fly Filling Stitch. Begin with a row of fly stitch , working horizontally and overlapping the stitches by half each time, as shown in the photo below.