After I had my patchwork rows finished, I sewed a solid white strip beneath all but the last row. And then I pieced those rows together in pairs, then quartets, then all together.
And then I was done! I showed it to Elise, who didn’t seem to care much, but I’m not taking it personally. Yet.
Total time spent so far: About 9-10 hours.
Next step: assembling the quilt back.