Cauliflower has a smidgen of nicotine. Although much lower nicotine than eggplant, this recipe for roasted cauliflower from Dr. Nandi caught my eye.
The cruciferous veggies have neurologically important amino acids like cysteine for example, and essential minerals like chromium (in broccoli, not cauliflower) that help regulate blood sugar.
From World's Healthiest Foods:
In one bite of this dish you've got nicotine, cysteine, curcumin, and vitamin C to name a few key neuro-ingredients. I think I'll try it :-) I'll add hot sauce, turmeric, cinnamon, and nutmeg to the glaze...