INGREDIENTS
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1 tablespoon canola oil
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1 medium onion, finely chopped
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1/2 green bell pepper, finely chopped
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1 celery stalk, finely chopped
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2 cloves garlic, minced
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Coarse salt and ground pepper
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1 pound ground beef
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1 can (15 ounces) tomato sauce
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1/4 cup ketchup
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1 tablespoon Worcestershire sauce
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4 hamburger buns, split and toasted