Lettuce

the secret life of a lettuce - its heart is very well insulated from the rain, wind and snails - perhaps not tiny worms and aphids, a bit like the cold and damp that seeps into British houses form prolonged cold wet weather

Patrick Leigh Fermor called living in England "like living in the heart of a lettuce" - he was pining instead for the "hot stones and thorns and olive trees and prickly pears" of Greece

but if you have to live in a something like a lettuce, it may as well be a well-insulated one so that you can call your home your castle and live happily in it