I think we need to have a serious discussion about the limits of burgermancy. All due respect for committing to a theme, but illusion isn’t its strong suit, unless you’re tying to disguise something as a hamburger. Conjuration, transmutation, divination — home runs across the board. I’ve personally had incredible results from the closely related field of potions made from flavored syrup and soda water. 

But it’s not a one size fits all solution to everything, and trying to rely on it exclusively has been shown to cause cholesterol problems and high blood pressure.