Mix mustard, salt and orange juice. Gradually fold in the oil. Place the green beans in 125 ml boiling water without defrosting. Bring to the boil and cook for 5 minutes, drain and drain. Drain the white beans. Peel onions and cut into fine rings. Leave bacon in a pan without fat until crispy.
Take out and let drain on kitchen paper. Pluck the bacon into pieces. Wash thyme, dab dry and pluck leaves from the stems, except for a few stems for garnishing. Mix beans, bean seeds, onions, thyme, bacon pieces and vinaigrette. Season with pepper if necessary. Garnish with the remaining thyme. Roasted baguette tastes good with it