extra lean ground beef
Salt and pepper and brown the beef then drain off fat in a sieve.
Put vegetables in a food processor, process until finely chopped and add to meat in a medium saucepan.
Saute, covered, over low heat until vegetables are tender, about 5 minutes.
Add chili powder, tomato paste and water, and simmer about 10 minutes.
Add salt and pepper to taste.
Cook ziti until it is cooked al dente.
Drain ziti and mix well with sauce.