Cook the pasta per the package instructions for 'al dente'. Reserve 1/2 cup of pasta water, then drain completely, and set aside.
1 lb cavatappi pasta
Melt the butter in a large, oven safe skillet over medium heat. Once melted add the flour, seasonings, and mustard. Whisk together to evenly combine, and cook for 60 seconds.
3 tbsp butter, 3 tbsp flour, 1 tsp onion powder, 1 tsp garlic powder, 1 tbsp Dijon mustard
Slowly add the pickle juice, milk, and cream whisking constantly until combined. Let the mixture simmer for 3-4 minutes, stirring often.
1/4 cup dill pickle juice, 2 1/2 cups milk, 1 cup heavy cream
Reduce the heat to low, add the cheeses, and stir together until melted and smooth. Season with salt and pepper, to taste.
1 1/2 cups shredded cheddar cheese, 1 cup shredded havarti cheese, salt & pepper
Add the pasta to the dish, gently stirring until evenly incorporated and well coated. If the sauce is too thick stir in some of the reserved pasta water, just until it reaches your desired consistency.
Add the chopped pickles and dried dill, then stir until evenly combined. Spread the pasta out evenly in the skillet, then top with the chips.
1/2 tsp dried dill weed, 1/2 cup chopped dill pickles, 1 1/2 cups lightly crushed plain kettle cooked potato chips
Bake at 400° for 15-20 minutes.
Serve warm and enjoy!