Garlic herbed beef with kohlrabi remoulade recipe

Ingredients

• Garlic herbed beef and watercress
• 2 tablespoon olive oil
• 1 tablespoon flat-leaf parsley, finely chopped
• 1 tablespoon thyme leaves
• 1 clove garlic, finely chopped
• finely grated zest 1 lemon
• 4 pieces beef fillet (about 200g each)
• lemon wedges (optional)
• watercress, to serve
• Kohlrabi remoulade
• 2 tablespoon mayonnaise
• 1 tablespoon dijon mustard
• 1 tablespoon each finely chopped chives and flat-leaf parsley
• 2 teaspoon horseradish
• juice ½ lemon
• 1/2 celeriac (about 200g), cut into julienne
• 1/2 kohlrabi (about 200g), cut into julienne