Step 1

Preheat the oven to 375°F. Grease an 8 x 8-inch baking dish.

Step 2

Cook pasta according to the package directions, reducing the cooking time by 1 minute. Drain and set aside.

Step 3

In a large pan, cook the bacon until crispy. Chop the bacon and set aside. Pour off all but 1/4 cup of the fat in the pan. Heat it over medium-high heat and add the flour, whisking until combined, and then cook for 1 minute. Add half the milk, whisking continuously until thickened, about 5 minutes and then repeat with the other half of the milk. Add the Gouda, pepper jack, and all but 2 tablespoons of the Parmesan and stir until the cheese melts. Stir in the paprika, cayenne, and salt and black pepper to taste.

Step 4

Fold in the shells and bacon and transfer to the greased baking dish. Top with the panko, a pinch of salt, a few turns of pepper, and the reserved 2 tablespoons Parmesan. Bake until the top is browned, about 25 minutes. Cool for 5 minutes and enjoy with ketchup, if desired.