Roast Beef Salad - Justine Pattison

Ingredients

• 1 tbsp black peppercorns
• 1 tsp flaked sea salt
• 1 kg beef topside, rolled and tied
• 1 small red onion, (thinly sliced and separated into rings)
• 2 tbsp red wine vinegar
• 85 g bunch or bag of watercress
• 2 little gem lettuces, (leaves separated)
• 4 large ripe tomatoes, (cut into wedges)
• 15 g fresh flat-leaf parsley, (leaves finely chopped)
• 1 tsp dried oregano or 1 tbsp finely chopped fresh oregano
• 1 plump red chilli, (deseeded and finely chopped)
• 1 small garlic clove, (crushed)
• 1 tsp dijon mustard
• 4 tbsp extra virgin olive oil
• 1 tbsp cold water
• pinch of flaked sea salt
• ground black pepper