This pasta version of French Onion Soup makes a simple, delicious comfort meal full of onion flavor and gooey melted cheese. Sweet onions are caramelized in olive oil and butter to form the base of the sauce.
 

Caramelized Onions Add Tons of Flavor
It takes at least 30 minutes to get onions truly caramelized and really maximize their flavor so don’t rush this part. They can easily be made a day or two in advance if you need to get a quick weeknight meal on the table.
 
Additional Flavorings
A packet of dry onion soup mix is added for even more onion flavor. I always like a little sherry and thyme in my onion soup so I add them in here too.
I use beef broth for the sauce because I think it adds a stronger flavor, but you could use chicken broth instead, or even vegetable broth. To add some protein, I mixed in some shredded rotisserie chicken, but it is totally optional.
 
Easy Clean-up
The whole dish gets assembled in the pan you cook the sauce in and then broiled to melt the cheese on top. I transferred it to a casserole dish, but if your pan is oven-safe, you could just put the pan in the oven.
Broil it until it gets crispy brown spots. That’s always my favorite part of French Onion Soup.  
Storage
Leftovers will keep in an airtight container in the refrigerator for 4 days and can be reheated in the microwave.

 
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