Great and with a few modifications--milk instead of half and half to cut back fat and calories; we only eat fresh veggies and seasonal, no frozen as in N Ca with plenty of fresh choices. In spring--half a large red bell pepper, asparagus tips, fingerling potatoes (about 6), baby carrots (about 6)--all cut into 1/2-1/4" bite size pieces. Sauté about 10 minutes in butter, then add flour plus finish recipe. Omit frozen veggies and celery. Bell pepper gives crunch. Also add garlic--2 cloves diced, and keep onion. Red pepper if want to walk on the wild side. Best base recipe ever!!!
My daughter found this recipe about three years ago. It is delicious as written. We always make two and freeze one or give it away. Everyone loves it.