In a 4- to 5-quart pan, bring 2 quarts water to a boil over high heat. Add beans and cook, uncovered, until tender-crisp, 5 to 8 minutes; drain and pour into a bowl.
Meanwhile, mix mustard with vinegar, maple syrup, and oil. Pour over hot beans and mix to coat well; sprinkle with onion. Season to taste with salt and pepper.
0 servings
* The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.