I caught a cold on Jan 2 and couldn’t shake it. Could not smell, wheezed and coughed,etc. Thought about that remedy, had two sammiches,(had to make them myself)and was alright. Momma was correct.
Onions and garlic are amazing. Raw garlic kept me from catching the flu a few years ago when my entire family went down like dominoes. It’s pretty brutal to eat so I made a garlic tincture (still awful, but better than raw) and use that whenever I feel something other than a cold coming on.
I still remember cringing whenever I saw my grandpa prepare his sandwiches, but other than cardiovascular disease late in life he was never sick. My mom always said it was the beer and onions that kept him alive so long. After looking at another response to your post, I wonder if he picked up the onion sandwich habit after serving in WWII?