Basil, tomato and prawn linguine - San Remo

Ingredients

• San Remo No 1 Linguine 500g
• 1 tbsp olive oil
• 500g prawns, peeled with tails intact (reserve shells and heads)
• 6 anchovy fillets in oil, drained, roughly chopped
• 4 garlic cloves, thinly sliced
• 1 long red chilli, thinly sliced
• 1 bunch basil, stems chopped, and leaves picked
• 1 punnet cherry tomatoes, halved
• 700mL tomato passata
• ⅓ cup crème fraiche