1. Preheat oven to 350°. Prepare cellentani pasta according to package directions. Transfer hot pasta to a large bowl.
2. Melt 2 Tbsp. butter in a medium saucepan over medium heat. Gradually whisk in flour until smooth; cook, whisking constantly, 1 minute. Gradually whisk in milk and evaporated milk; cook, whisking constantly, 3 to 5 minutes or until thickened. Whisk in Gouda, cream cheese, salt, and 1/4 tsp. ground red pepper until smooth. Remove from heat, and stir in chopped ham.
3. Combine pasta and Gouda cheese mixture, and pour into a lightly greased 13- x 9-inch baking dish. Stir together 2 cups crushed cereal, 2 Tbsp. melted butter, and remaining 1/4 tsp. ground red pepper; sprinkle over pasta mixture.
4. Bake at 350° for 30 minutes or until golden and bubbly. Let stand 5 minutes before serving.
Note: For testing purposes only, we used Barilla Cellentani Pasta.