1/2 cup finely chopped Red Dog Farm sweet onion
1/2 tablespoon red wine vinegar
1/2 tablespoon grainy Dijon mustard
1 pound Red Dog green beans, trimmed
1 tablespoon extra-virgin olive oil
1/4 cup finely chopped Red Dog Farm Italian parsley

Stir together onion, vinegar, mustard, 1/4 teaspoon salt, and 1/4 teaspoon pepper in a large bowl. Marinate about 10 minutes.

Meanwhile, cook beans in a large pot of well-salted boiling water, uncovered, until just tender, about 6 minutes. Transfer to a large ice bath to stop cooking. Drain and pat dry.

Whisk oil and parsley into onion mixture, then toss with beans.