probably the reason magnum hops are used for bittering and not flavor/aroma.I guess if you've added onions or chives to beer in your glass, and thought "Yum!", that would work. For most people I know onions (and chives) and beer don't mix. It sounds more than gross to me.
dude, are you for real? you could use potatoes as an adjunct in your mash, but not to replace hops, man. really, i think you're pulling our legs here.... but i'll play.what would you recommend if I didnt have hops? and I can use potatoes? What is potato ale?