Personalized Chef Aprons and More!
In a kettle of boiling water cook the beans for
2 to 4 minutes, or
until they are crisp-tender, transfer them with a slotted spoon to
a bowl of ice and cold water to stop the cooking, and drain them
well. Pat the beans dry with paper towels and chill them, covered,
for at least 3 hours or overnight.
In a large bowl whisk together the mustard, the
vinegar, and salt
and pepper to taste, add the oil in a stream, whisking, and whisk
the dressing until it is emulsified. Add the beans, the mint, and
the onion and toss the mixture until it is combined well.