Instructions

  1. In a large skillet, bring 1 cup water, oil, salt, and pepper to a simmer over medium heat.
  2. Add the green beans and onion.
  3. Cover, and cook until the beans are crisp-tender, 8 to 10 minutes.
  4. Uncover, and continue cooking, stirring frequently, until water has evaporated, beans are tender, and onions are beginning to brown, 5 to 8 minutes more.
  5. Stir in vinegar and serve.