Bring a large pot 2/3 full with water and bring to a boil. Add green beans and cook until tender {about 3-4 minutes}. Drain and then place beans in a bowl of ice water to cool. Drain and pat dry.

In a large bowl, whisk vinaigrette, horseradish mustard, sugar, garlic and salt until the sugar is dissolved. Add canned beans, green beans and onions to vinaigrette and toss to coat.

Refrigerate, covered, at least 4 hours. Stir in shredded basil and a little fresh cracked pepper just before serving. Yum yum yum.