No stitching line is needed for this block -- we will stitch 1/4" from the unfinished edge.
Place the applique piece face down on the interfacing and stitch all the way around.
Trim through both layers leaving a scant 1/4".
Trim the corners to reduce bulk. (Blurry photo, but you can get the idea.) Snip to the stitching line at the inner point of the heart.
Carefully make a slit in the interfacing only. Then turn the piece to the right side through this slit.
Make sure the edges are turned right along the stitching. Use an iron to make crisp edges.
Your appliques are ready to be stitched in place on your project