Another option, if you are concerned about seams and such...
Get a pretty piece of backing material just a bit larger than the finished portion and appliqué the DWR to it, then make blocks to encircle it that have a special meaning for you. Some possibilities could be: the 1st block she taught you, or patterns that the 2 of you worked on together, or blocks you remember watching her make. In this way you could have a tribute quilt to her, and her quilt to you.
Just a thought