For 4 servings:
For the lamb
200g lamb loin
50g chopped spring onion
A pinch of shiso cress to garnish
A slice of lemon to garnish
For the ponzu sauce
50ml soy sauce
100ml vinegar
20ml lemon juice
For the onion ponzu
150g chopped onion
100ml ponzu
120ml grapeseed oil
10g garlic