I made this recipe as is and had a tough time with the sauce. The butter and flour ratio left me with clumpy cheese sauce that all the whisking in the world couldn't fix. I want to try this one again with a more traditional butter/flour ratio and see if it works better. I also thought the cheese flavor was a bit too bland. If you like a stronger cheese flavor like me, I suggest less havarti and more cheddar.
somewhat labor intensive with all the chopping and roasting, and took a while to make but the results were worth it. creamy and delicious. definitely will make again.