I am an allium lover with a strong allergy to all alliums. It is technically a sensitivity, as it isn't an instant reaction, but spending an hour in the bathroom because of one stray piece of red onion warrants a scarier word then "sensitivity". For those not familiar with plant taxonomy, alliums are the plant family that holds garlic, onions, chives, and leeks.
My allergy is progressively getting stronger and I can no longer lie to myself. I need a good substitute for that fantastic allium taste. Right now I can still eat garlic in reasonable amounts (thank god), but red onions are out, and everything else from white onions to leeks is somewhere in between. Any and all preparations of allium trigger the allergy, so no onion powder.
I am desperately looking for a non-allium onion substitute. My hope and dream is something that tastes like onion but isn't an allium. I would accept any strongly flavoured class of plants to switch addictions to.