Yeah, just throw some fiat currency in the oven with some fruit and, voila, PIEcoin.
But for real, I use Cryptopia Exchange to buy PIEcoins because I happened to have an account there AND they happened to have PIE available, however, C-Cex and Yobit have them as well. Sign up for Cryptopia with my affiliate link and I'll throw you a couple SBD.
I'm like cryptobeginner so I'm still earning my first cents, thanks for suggestion :) I'll try later, when I'll be back from my trip and have usual laptop ;)