Cook the macaroni according to the directions on the package; drain and set aside. Heat the oven to 400 degrees. Spray a 2-quart casserole dish with nonstick cooking spray; set aside. In small food processor bowl, place cottage cheese. Process the cottage cheese at high speed for 30 to 60 seconds or until creamy.
In a 4-quart saucepan over medium heat, bring the whipping cream to a low boil. Add the creamed cottage cheese. Using wire whisk, stir until the cottage cheese is mixed into the cream (1 minute). Remove from heat. Stir in the Cheddar cheese, Swiss cheese, dry mustard, salt, nutmeg, and pepper until the cheeses melt (2 to 3 minutes).
Add the cooked macaroni to the cheese sauce. Spoon the pasta into the prepared casserole dish and cover. Bake for 20 to 25 minutes or until the pasta is hot.
Meanwhile, in a small skillet, over medium heat, melt the butter. Add the bread crumbs. Cook, stirring frequently, for 1 to 2 minutes until bread crumbs become light brown. Remove from heat and stir in the Parmesan cheese.
Remove the cover from the casserole and sprinkle the top of macaroni and cheese with the breadcrumb mixture. Return to the oven for 5 more minutes or until the Parmesan cheese melts and is golden brown.