Preheat the oven to 400 degrees F and grease alarge casserole dish with olive oil.
Bring a large pot of salted water to a boil.Par-boil the cauliflower for 3 minutes. Drain and return to the warm pot to letthe steam dry some of the moisture from the cauliflower. Gently pat dry toremove any remaining moisture.
Melt the butter in a medium skillet over mediumheat. Sprinkle in the flour and cook, stirring constantly, for 2-3 minutes.This removes the raw taste from the flour.
Slowly pour in the milk and heavy cream andcontinue cooking 2-3 minutes or until the mixture thickens.
Turn off the heat and add fontina. Stir until the cheese is fullymelted.
Place the cauliflower florets in the preparedcasserole dish. Pour the fontina béchamel all over the cauliflower. Sprinklewith parmesan cheese and place in oven to bake 20 minutes or until nicelybrowned and bubbly on top.
Remove from the oven and sprinkle with freshparsley. Enjoy!