One simple recipe for Johnny Marzetti uses just seven ingredients plus water, salt, and pepper, and takes one hour and ten minutes to complete. The main steps include cooking the pasta and browning the beef before mixing them together with tomato sauce and baking in the oven.
Preheat the oven to 350 degrees Fahrenheit. Boil 8 ounces of elbow pasta or egg noodles until al dente. While the pasta cooks, brown a pound of ground beef in a skillet, then add one cup of chopped onion and two cups of chopped celery. When softened, add salt and pepper as desired, then add one 10.75-ounce can of condensed tomato soup, one 8-ounce can of tomato sauce, and a cup of water. Simmer the mixture for 10 minutes. Drain the cooked pasta, then mix with the meat, vegetables, and tomato sauce and carefully pour into a casserole dish.
Place the dish in the preheated oven and bake for at least 20, but no more than 30, minutes, then remove. Scatter two cups of shredded sharp Cheddar evenly over the mixture, then return to oven for up to five minutes more, or until cheese is melted.
The estimated total preparation time for this dish is 30 minutes, with a cooking time of 40 minutes.