So i have figured out how to magically shrink ones roaster size... ready here it is:
first, wake up before the sun and go to the roasting facility.
second, warm up the roaster. stare at it like its your fiance at your wedding.
third, start roasting; don't stop roasting until after the sun sets (12-16 hours).

-trust me. if you do this, your roaster will seem extraordinarily small the next time you look at it.

p.s. this is not a recommended scenario.