Preheat oven at 350°F.
In medium saucepan, Cook pasta until al dente. Set aside. Meanwhile , in large pan ,brown ground beef in a tbs of butter. When fully cooked, drain fat and add pasta sauce .

Pour the meat and sauce mix into the pasta and stir well to distribute evenly. In large casserole dish , fill bottom inch with pasta mix, then cover with single layer of pepperoni, repeat, then cover last layer with grated cheese and sprinkle with Parmesan . Cook 30 minutes at 350•F