1 pound green beans, trimmed
¼ cup creamy peanut butter
1 tablespoon sugar
2 tablespoons rice vinegar
2 tablespoons soy sauce
2 tablespoons minced fresh ginger
1 tablespoon oil
1 teaspoon minced garlic
¼ teaspoon crushed red pepper flakes
Chopped peanuts, if desired

In a medium saucepan, bring about 6 cups of water to a boil. Add beans and cook for about 6 minutes; drain and rinse with cold water. Whisk together all remaining ingredients except peanuts. Cover and refrigerate. Just before serving pour dressing over beans and garnish with chopped peanuts, if using.