Fry ground round steak and diced onion in butter until browned.

Add diced green peppers and celery to the meat mixture.

Cook the vegetables until they are tender.

Incorporate canned tomatoes into the mixture.

Boil broad noodles according to package instructions until al dente.

Drain the cooked noodles and add them to the meat and vegetable mixture.

Transfer the combined mixture to a baking dish.

Dot the top of the dish with butter.

Season with salt and pepper to taste.

Bake in a preheated 350°F (175°C) oven for 30 minutes, or until bubbly and heated through.