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| onions (chopped): 1/4 cup (finely chopped) |
| green bell pepper (chopped): 1/4 cup (finely chopped) |
| white mushrooms: 3 Tbl (chopped) |
| chili sauce: 3 Tbl |
| ground beef: 1 lb |
| hamburger buns: 4 buns (split) |
| ketchup (optional) |
| yellow mustard (optional) |
Credit: Food.com