Sequoia Brussels sprouts are delicious but it’s pretty hard to finish one.
Yes, it’s a pretty obvious riff on the main joke, i.e. entertaining the idea that Brassica sequoia is a real thing, based on the fact that brussels sprouts, like cauliflower, collards, kohlrabi, cabbage and others, are all cultivars of B. oleracea.
If you didn’t know that last bit, I can see getting confused about the alt-text.