I've been defrosting a freezer the last two days, and I found a container of my onion soup, so we tried an experiment with French Onion Soup tonight, we used some parmesan crisps that they sell at Sams that are virtually carb-free, 19 of them is one carb. We used a half-dozen of those in place of the stale bread that traditionally goes on top, with whole milk mozzarella on top of that.
We tried one small test bowl, and both of us liked it well enough that we had full bowls of it (with one half using parmesan crisps and the other using a 25 gram slice of bread, just to complete the comparison test) for supper.
I need to work out the carbs on the soup, if you look onion soup up on the web you'll get numbers all over the map, from 8 carbs to over 45. My guess is the latter is assuming a big hunk of stale bread on top. I'm currently coming up with about 25 carbs/bowl, but I think that's probably overstating it a bit. But the ketogenic diet book I bought a while back has some sample meal plans and some of the dinners are in the 45-65 carb range, so a 35-40 carb meal is doing OK.
We had less than half of the soup from the freezer, so we've got another French Onion Soup dinner coming in the next few days. Yummy and probably reasonably keto-friendly. (I'll know for sure in the morning when I check my ketones.)
Gruyere cheese is traditional for French Onion Soup, but I've seen recipes that use paremesan or mozzarella. I've also used a four-cheese blend that we used to get at Sams that they sadly no longer carry, and I've used havarti with some mozzarella on top (because havarti will melt but it won't brown).
