Ok, decided to try it on my own.

I used 2 chicken leg/thigh quarters. I cooked them for a bit in the microwave first, then finished browning them off in a pan. I didn't have the onion or celery, but everything else was to recipie, maybe more broccoli as I used up the last of the fresh I had.

It turned out great. The sauce reminds me of cheesy broccoli soup. I had a massive amount of left over sauce, so thinking at least 4 quarters would of been a good idea.

Pre Lc growing up one of my favorite dinners was chicken cooked in cream of mushroom soup then served over rice. This isn't quite the same as it's cheesier and the broccoli, but still really good. Could be a good recipie to make with cauliflower instead, or to serve over cauliflowered rice.