Mustard beef and watercress salad

Ingredients

• 1 small onion finely chopped
• olive oil
• 2 rump steak
• 1 tbsp wholegrain mustard
• 2 tbsp half-fat crème fraîche
• a squeeze lemon to taste
• 2 handfuls watercress

Instructions

1. 1

   Fry the onion in a little olive oil until softened, add the steaks and cook for 2 minutes on each side (for rare, 3 for medium) then lift out the pan to rest for 2 minutes. Add the mustard, crème fraîche and lemon juice to the pan and stir together, add a splash of water if the sauce looks too thick.

2. 2

   Slice the steak. Serve with watercress and sauce.