Cook pasta in a Dutch oven according to package directions, omitting salt and fat.
Preheat oven to 375°.
Combine breadcrumbs and 1 tablespoon Asiago cheese. Set aside.
Gradually whisk milk into flour in a medium saucepan until smooth; add butter, salt, and pepper. Bring to a boil over medium heat, whisking constantly. Add processed cheese, whisking until cheese melts. Remove from heat.
Stir cheese sauce, Havarti cheese, and 3 tablespoons Asiago cheese into pasta until blended. Pour into a 2-quart oval casserole coated with cooking spray. Sprinkle with breadcrumb mixture.
Bake at 375° for 30 minutes or until bubbly and golden. Let stand 10 minutes before serving.