Step 1

Cook bacon as desired. (I like to arrange on a rimmed baking sheet lined with foil and bake at 425ºF for 15 minutes.)

Step 2

Heat oven to 350 degrees F. Coat a 3qt baking dish with nonstick cooking spray.

Step 3

Cook cavatappi pasta as directed on the package. (Make sure to lightly salt the water.)

Step 4

In a medium saucepan, melt butter and flour together over medium heat.

Step 5

Slowly whisk in the milk, pouring in a thin stream and stirring constantly.

Step 6

Stir in onion powder, salt, and pepper.

Step 7

Allow milk mixture to come to a boil, then reduce heat and simmer two minutes.

Step 8

In a large bowl, toss together cheddar, colby-jack, and mozzarella.

Step 9

Whisk in sliced cheese and 1 1/4 cups of cheddar mixture. Remove from heat.

Step 10

Toss the bacon pieces in with remaining cheddar mixture.

Step 11

Combine pasta and cheese sauce, toss to coat.

Step 12

Pour half into prepared dish and sprinkle with a generous cup of the bacon-cheese mixture. Repeat layering.

Step 13

Bake for 20 minutes, until cheese is bubbly.