In that case, it does sound like it would work for this pepper/onion dressing as an ingredient/slight sweetener for that dressing and I’ll taste some by itself. I’m not into sweet but never know.
I like umami. Love things that have msg but generally don’t buy them because it’s much like the jabs, FDA approved yet questionable. The exception is Knorr’s tomato bouillon with chicken flavor which I use to make kind of a Vigo copycat yellow rice, my son’s comfort food. “moderation”
Chop you up some kombu in your dressing!