Green Goddess Loaded

The science behind the song

Iceberg lettuce has a reputation as the least useful item in the salad drawer: mostly water and crunch, genuinely lower in fibre and micronutrients than darker leaves. But that isn’t really what this song is arguing. On its own, iceberg is a vehicle. What it carries is where the interest lies.

Chives, like the rest of the allium family (onions, garlic, leeks), contain fructans, a type of fibre the human gut can’t digest but that certain gut bacteria, particularly Bifidobacteria and Lactobacilli, can ferment into short-chain fatty acids. That fermentation is what makes alliums a genuine prebiotic food rather than just a garnish, though it’s also why they can cause bloating in people sensitive to FODMAPs.

Tahini and cashew cream bring their own contribution. Sesame and cashews are both sources of plant fats and, in sesame’s case, lignans with antioxidant properties, and swapping a mayonnaise-based dressing for a nut or seed-based one changes the fat profile of the whole dish.

None of that makes a lettuce wedge a superfood. It makes it, once it’s properly loaded, a reasonably good example of how a single plate can carry several different plant compounds at once, which is really the point of the album’s wider thirty-plants-a-week theme.

References

Wan, M. L. Y., et al. (2025). The prebiotic potential of dietary onion extracts: shaping gut microbial structures and promoting beneficial metabolites. Frontiers in Nutrition. pmc.ncbi.nlm.nih.gov