In a 12-inch nonstick skillet, heat the oil or butter over medium heat. Add the green beans and cook for 2-3 minutes, stirring often, to crisp up the edges of the beans just slightly.
Add the broth and salt. Toss to combine.
Bring to a simmer. Cover the skillet and cook 6 to 10 minutes, depending on desired tenderness.
Remove from the heat. Season with additional salt, if needed. Optional: sprinkle lemon zest or Parmesan cheese over cooked green beans.
Serve immediately.
Notes
Beans: The beans can be cut into 1- or 2-inch lengths or left whole. Frozen green beans work fine in this recipe if fresh aren't available. Add a minute or so to the cooking time if using frozen green beans (don't thaw before adding to the skillet).