This curious vegetable looks like a slender purple banana. It has a bumpy, almost smooth outer skin that gives way to a surprisingly spongy and white inner flesh. Though it's relatively thin, this veggie packs quite a crunch when raw. To add depth, you could use a blend of ultramarine blue and perylene purple to create the dark purple base. To give the veggie a bit of shine and vibrancy, use a bright green shade for the highlights and shadow around the creases. For the inside, use a light ivory for the spongy white flesh and add some golden yellow for the highlights. Finally, to bring it all together, a dark olive green for the shadowing and dark shades.