For the steak
- 1 Irish rib eye steak, at least 300g in weight
- vegetable oil, for brushing the steak
For the watercress salsa verde
- 80 g watercress
- 6 anchovy fillets
- 1 handful of mint leaves
- 1 handful of parsley leaves
- 2 tsp Dijon mustard
- 1 large garlic clove, crushed
- 8 tbsp extra virgin olive oil
- Juice of 1 lemon
- 2 tablespoons capers
- black pepper