Heat the olive oil in a medium skillet over medium-low heat. Cook the onion and garlic until soft, about 7 minutes. Add the green beans along with the tomato juice, salt and pepper. Stir well, cover and cook, stirring every 5 minutes, until the beans are tender and wilted, about 30 minutes. Stir in the fresh oregano and cook an additional 5 minutes. Serve hot.
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