1 pound ground beef
2 large onions, chopped
1/2 cup diced celery
1 cup sliced mushrooms
2 tablespoons shortening
1/4 cup ketchup
1 cup tomatoes
1 cup water
1 teaspoon chili powder (or more to taste)
salt and pepper to taste
2 tablespoons minute tapioca
Fry ground beef, onions, celery, and mushrooms in hot shortening until brown. Add ketchup, tomato, water, and seasonings. Cover and simmer 15 minutes. Add tapioca and cook until slightly thick. Split soft rolls and brown in frying pan. To serve, surround bowl of burger mixture with pan-toasted rolls.