In saucepan cook macaroni per package directions. Basically, bring salted water to boil; add macaroni and cook until tender about 7-10 minutes. Drain.
In the meantime, brown ground chuck that has been seasoned with salt and pepper. Cook until done then drain. Note: I use a large iron skillet.
Add the tomatoes and tomato sauce to ground beef Add oregano leaves, if desired. Stir in cooked macaroni and let simmer about 20 minutes. Stirring occasionally. Remove from heat and top with shredded cheese.