This is one of my favorite ways to use sashiko stitching.
A few years ago I went through a binge of working with wool. I discovered sashiko thread is the perfect thread for applique with wool because it is so soft it settles into the wool - no floating on the surface. I also discovered that if you have a solid color piece of wool and it seems a little too flat, you can add some energy and texture to it by sashiko stitching it.
But background texture and interest isn't the only way to use sashiko on wool.
This echinacea sashiko and applique block is from pattern by Sylvia Pippen's Wildflower series.
And this whimsical kissing fish design was just fun to make.