Ingredients

Coarse salt and ground pepper 

3/4 pound green beans, trimmed and cut into 1-inch pieces 

2 tablespoons white-wine vinegar 

2 tablespoons extra-virgin olive oil 

1 can (15.5 ounces) cannellini beans, rinsed and drained 

1/2 small red onion, thinly sliced 

1 can (5 ounces) solid white tuna packed in water, drained and broken into pieces 

1/4 cup thinly sliced pepperoncini (about 9) 

Preparation

In a medium pot of boiling salted water, cook green beans until bright green and crisp-tender, about 3 minutes. Drain, rinse under cool water to stop the cooking, and pat dry.

In a large bowl, whisk together vinegar and oil and season to taste with salt and pepper. Add green beans, cannellini beans, onion, tuna, and pepperoncini and stir to combine. Serve immediately.