Green and white bean salad with tuna

3/4 lb green beans, trimmed and cut into 1-inch pieces
2 TBS white-wine vinegar
2 TBS olive oil
1 can (15.5 oz) cannellini beans, rinsed and drained
1/2 small red onion, thinly sliced
1 can solid white tuna packed in water, drained, and broken into pieces
1/4 cup thinly sliced pepperoncini
coarse slat and pepper

1. 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.

2. 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.

via Everyday Food magazine