Ingredients
Directions
1.
CUT cauliflower into florets (about 3 cups); PLACE florets in a medium saucepan; ADD enough salted water to just cover; BRING to a boil; COOK until tender, about 10 minutes; DRAIN; SET aside.
2.
In a medium saucepan, MELT butter over medium-high heat; WHISK in flour until smooth; gradually ADD milk, WHISKING constantly, until mixture begins to thicken.
3.
ADD cheese and sour cream, STIRRING until cheese melts (do not boil).
4.
STIR cauliflower, ham and mushrooms into cheese sauce; POUR into a 2-quart baking dish.
5.
SPRINKLE breadcrumbs evenly over casserole; CUT cold butter into pieces; DISTRIBUTE evenly over breadcrumbs.
6.
BAKE casserole, uncovered, at 350 F for 45 minutes.