I love onion gravy, onion soup, and so on. I'll have to try this, EXCEPT....
Among other dishes, I was cooking onion soup for the office Christmas party one time. We were hosting. Well, the recipe called for cooking down six large yellow onions with sugar and so on.
So I did. Do you know what a big cast iron skillet full of six large yellow onions cooking down in a closed house in December might smell like after, say, 30 or 60 minutes? Grandma came staggering down from upstairs, eyes streaming. The dog was scratching at the door, begging, begging to be let out. Leaves were falling off the house plants*. Paint was coming off the walls.
We got through it, and the dinner was quite successful. But the star employee loved the onion soup. She raved about it.
Next year comes, and I offer to host the party again. The star employee was with Grandma and me. The employee says, excited, "Oh, could you make that onion soup again? It was soooo good!" Grandma groaned. I mean, it wasn't audible. But I knew it was there. Yup, repeat of last year. You have to keep the star employees happy.
*Actually, this doesn't need onion fumes to happen. We're terrible with house plants.