Purple Potato Causa Recipe - Great British Chefs

Ingredients

• 200g of purple potatoes, or regular floury potatoes
• 1 tbsp of lime juice
• 2 tbsp of olive oil
• shiso cress leaves, or small basil leaves to garnish
• salt
• freshly ground black pepper
• 2 aji amarillo chillies, or 2 medium-heat red chillies and 1/2 a yellow pepper, deseeded and finely chopped
• 1 tbsp of olive oil
• 1/4 onion, finely chopped
• 2 garlic cloves, finely chopped
• 150g of tuna, chilled and finely chopped
• 1 tbsp of mayonnaise
• 1 slice of fresh ginger, 3mm thick
• 1/2 garlic clove, bruised
• 2 sprigs of coriander
• 6 limes, juiced
• 1/4 rocoto pepper, or 1 medium-heat red chilli, deseeded and chopped
• 1/4 tsp salt
• 1 avocado, large and ripe
• lime, a squeeze of juice