INGREDIENTS
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1 pound ground beef
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½ cup bread crumbs
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2 Tablespoons ketchup
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1 Tablespoon Worcestershire sauce
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1 teaspoon mustard powder
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1 egg
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salt and pepper
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2 Tablespoons butter
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Gravy:
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1 tablespoon olive oil
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6 ounce mushrooms
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½ large onion sliced
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2½ cups beef broth
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2 Tablespoons ketchup
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2 Tablespoons Worcestershire sauce
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1 Tablespoon cornstarch
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1 Tablespoon water