1 lb. ziti-shaped pasta
1 lb. Ricotta cheese
3 c. shredded Mozzarella cheese
3 c. bottled spaghetti sauce (or your own)
1/2 c. grated Parmesan cheese

Preheat oven to 350 degrees. Cook ziti in boiling water until a little firm. Drain and place in a large bowl. Mix together the Ricotta cheese and HALF the Mozzarella cheese with the ziti. Grease a 10 by 15 inch baking pan. Cover bottom of pan with HALF the spaghetti sauce. Spoon the ziti mixture into pan. Cover with the remaining spaghetti sauce. Sprinkle with Parmesan cheese and remaining Mozzarella cheese. Bake for 20 to 30 minutes.