Sure you can embroidery the block. and then set it together with sashing. But a thing that I do is I cut the block bigger do the embroidery design , with my embrodiery machine, then press it and trim to correct size. Sometimes your design can change the block size, I do this also when I do Redwork on embroidery machine. It is alway better to cut bigger and then trim to correc t size. I made a christmas quilt in a Village redwork on tone on tone white and put christmas sashing between and then stiched about 1/4" from the seam on the inside of blocks It turned out great Have fun