1/2 tablespoon extra-virgin olive oil
1/2 cup finely diced sweet onion
Salt
Freshly ground black pepper
1/2 pound green beans, trimmed and cut into 1 1/2- to 2-inch pieces
1 tablespoon chopped fresh basil

Heat the oil in a small saute pan or skillet over medium heat until it shimmers. Add the diced onion; season with salt and pepper to taste. Let the onion cook slowly, for about 8 to 10 minutes, until it is soft but not browned. (Adjust the heat as necessary.)

Meanwhile, bring a large pot of salted water to a boil over high heat. Add the beans and cook for 5 to 7 minutes, until just tender. Drain and place in a serving bowl.

Remove the pan or skillet from the heat, then add the chopped herbs to the onion; taste, and adjust seasoning as needed. Toss the onion-herb mixture with the green beans and serve.