I did not have a pattern for the Salad Bowl I cut fabric into oblong pieces you sew the black on to the long side and stand one oblong up and lay one on its side, its like an optical illusion.
There is a pattern I have seen out named "Fractions" that is almost like it except the middle part is 4 pices sewn together before the sashing is sewn on, have just measured mine the salad pieces are 4"x 6.1/2" if I remember right.
It was a fun quilt to make.
Jill.