Preheat oven to 375f. Grease a baking pan well . Add caulifower, il, salt & pepper and mix well. Bake for 25 minues mixing halfway through.
While cauliflower is cooking boil your noodles.
While the noodles are boiling make the sauce. In a large pot or pan add butter to the pan over medium heat to melt. Whisk in flour and milk slowly getting rid of all lumps. Bring to a boil, then reduce the heat and simmer stirring often. Once the sauce has thickened a little add in the spices.
Add In 1 1/2 cups of shredded cheese to the pot and combine well. Drain & add the noodles to the cheese sauce along with the cauliflower. - mix well.
Spray a 9x13 inch baking pan with oil. Pour the mac & cheese mixture into the pan evengly. Top with remainng cheese and sprinkle the bredcrumbs over the top.
Bake for 25 minutes or until breadcrumsb are golden brown.