Bring a large pot of salted water to boil over high heat. Blanch cauliflower for 2 minutes. Transfer to a buttered 13x9” baking dish and let cool for 5 minutes.
In a small skillet, brown the diced pancetta, if you choose to add it. Transfer to bowl and set aside.
In same skillet, melt butter. Add flour and stir until combined. Continue stirring for 2 minutes to cook the flour.
Slowly add milk, stirring constantly until milk is blended and not lumps appear.
Add the garlic and red pepper flakes. Stir sauce over low heat until it coats back of a wooden spoon.
Add parmesan and seasonings and pancetta. Stir to combine.
Pour sauce over cauliflower to cover.
Top with a sprinkling of bread crumbs.
Bake until bread crumbs are golden and cauliflower is cooked and hot. This takes about 20 minutes.
Notes
*****You can substitute good quality bacon for pancetta or add none at all.
Recipe by Geaux Ask Alice! at https://geauxaskalice.com/roasted-cauliflower-parmesan/