You could do something like this wall hanging. Just use Wonder Under and cut out your hearts and instead of sewing them down and then quilting, layer and sew around the appliques. That way it's appliqued and quilted at the same time.
I added lace down one side and across the bottom. You wouldn't have to do the piping and it would go faster.
[ATTACH=CONFIG]306412[/ATTACH]
[ATTACH=CONFIG]306413[/ATTACH]