Oh, No! An Applique Mistake!

I always think I am being so careful when I cut the back of applique blocks.  But somehow, this morning -- the first time ever --

I cut through the rust-colored fabric into checked fabric of the top circle!  The rust fabric behind the circle is completely cut away.  I was trimming inside the circle a little more.

Now what?  I searched the internet but didn't find any information about fixing a mistake like this.

Can I patch it?  Can I unstitch part of the plaid circle, sew a straight seam to add fabric, trim it, and re-stitch?

I doubt I will be able to unstitch the whole circle, replace it, AND have it come out looking remotely round.  I don't have the experience or ability (yet, if ever) to do it.

Will I need to begin again, from the background fabric up?

I stitched the rust circle yesterday while watching Downton Abbey.  I stitched (and cut the hole in) the checked fabric this morning.

This is what it looked like before I cut the slice out of it.

Have you ever had a problem like this?  If so, how did you resolve it?

I'm linking this post to Slow Sunday Stitching at Kathy's Quilts and Oh Scrap! at Quilting is more fun than Housework.  Thanks, ladies.

I hope you're making progress (and not regress, as I am) with your quilting endeavors!

--Nancy.
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