Possibly the most suggestive vegetable, served unsliced, it will definitely break the ice.
Hosta 'Space Odyssey'
Hemerocallis 'Night Beacon'
Persicaria amplexicaulis 'Flamingo Feathers'
Polemonium 'Golden Feathers'
Epimedium grandiflorum 'Purple Pixie'
Cornus alba 'Nightfall'
Mangave 'Praying Hands'
Viburnum plicatum 'Kilimandjaro Sunrise'
Symphoricarpos doorenbosii 'Amethyst'