Monterrey Medallions- is quick easy and has great instructions and has several variations in the book.
https://www.keepsakequilting.com/Mon...SABEgKXO_D_BwE
Stashtastic- All the patterns in his book uses fat quarters.
https://antlerquiltdesign.com/products/stashtastic
Log Cabin quilt would look fabulous in Christmas fabrics.
Check out Jordan Fabrics for her tutorials, she has several that uses Fat Quarters.
With a bundle that has that many different fabrics you could get a few quilts out it.