Beef carpaccio with marinated bean salad

INGREDIENTS

• sea salt
• freshly ground black pepper
• 250 g green or mixed beans, topped but not tailed
• 1 x 500 g quality beef fillet
• a few sprigs of fresh thyme
• olive oil
• 2 small shallots, or ½ a small red onion, peeled and very finely chopped
• 1 handful of fresh soft herbs (chervil, parsley, yellow inner celery, tarragon), leaves picked and chopped
• 1 teaspoon Dijon mustard
• 1½ tablespoons white wine vinegar
• extra virgin olive oil