When you finish your embroidery, press it on the backside. Using a nonpermanent marking tool (I like the Pilot FriXion Pen) mark a 6" x 6" square with the design centered. Then draw diagonal lines 1/2" apart for a crosshatch design for the quilting. I didn't quilt through the embroidery, only around it.
Quilt, taking the stitches to the outside line, but not beyond.