Mac-n-Smoked Gouda with Cauliflower

I had this the other day at my friend's house (leftover). So good. Really yummy. And my little girl (18-months) and her son (2 1/2) ate it, too.

from Rachael Ray, Food Network

1 lb. elbow macaroni or cavatappi (corkscrew-shaped pasta)
1 head cauliflower, cut into florets
1 T extra-virgin olive oil
2 T unsalted butter
1 small onion, finely chopped
3 T all-purpose flour
1/2 tsp. cayenne pepper
1 tsp. paprika
3 c. whole milk
1 c. chicken stock or broth
3 c. shredded smoked Gouda (about 12 oz)
1 T Dijon mustard
Freshly ground black pepper

Bring a large pot of water to a boil. Add salt to season the cooking water, then add the pasta.

Cook for 5 minutes, then add the cauliflower and cook for 3 minutes more or until pasta is cooked al dente and the florets are just tender. Drain well and return to the pot.

While the pasta cooks, heat a medium saucepan over medium-low heat. Add the extra-virgin olive oil and butter until it melts. Add the onions and cook for 3 to 5 minutes to sweat them out and turn the juices sweet. Raise the heat a bit, then whisk in the flour, cayenne, and paprika.

Whisk together until the roux bubbles up, then cook for 1 minute more. Whisk in the milk and stock and raise the heat a bit higher to bring the sauce to a quick boil. Once it bubbles, drop the heat back to a simmer and cook until the sauce thickens, 3 to 5 minutes.

Add the cheese to the thickened sauce and stir to melt it, a minute or so. Stir in the mustard and season the sauce with salt and pepper. Pour over the cauliflower and cooked pasta and toss to combine. Serves 5-6.