Adjective
easy as pie
(simile, colloquial) Very easy.
Although the engine may seem complicated to you, once you know the basics, auto repair is as easy as pie. Source: Internet
Otherwise, these are easy as pie – or in this case, easy as roasties. Source: Internet
I've always been deeply skeptical of the phrase "easy as pie.” Source: Internet
Perpetual grows in extra small spaces is now easy as pie. Source: Internet
Well, my peaches, its easy as pie. Source: Internet