INGREDIENTS
1 tbsp
butter
1/2 cup
chopped onions
1 tbsp
unbleached flour (all purpose is fine too)
4 cups
reduced sodium chicken broth (vegetarians can use vegetable broth)
1
medium head cauliflower, chopped (about 1 1/2 lbs florets)
4 cups
watercress (3 oz)
kosher salt and pepper