In a large pot of boiling water, blanch the green beans for 4-5 minutes, no longer, and then throw them in an ice bath to stop the cooking. Ice bath meaning a large bowl of water with ice in it.
Drain the beans and water.
In a large ziploc bag, put in all the ingredients, zip it tightly and shake it all around until all beans are covered.
Let cool in the fridge for 1 hour then toss them around again in the bag and cool for another hour.