Basil pesto: add the basil leaves, pistachio nuts, garlic and parmesan cheese to the bowl of a food processor and pulse to combine. Then remove the lid of the food processor and scrape down the insides of the bowl, keeping the pesto low to the bottom. Then drizzle in the olive oil, give it another pulse, remove and scrape down again and then add the lemon juice and pulse to combine. Once combined, use a spatula to transfer the pesto to a small bowl.
Pasta: read and follow the instructions on the pasta to cook it in a medium size bowl of boiling salted water. Moments before it is al dente (a little bit chewy) use a heatproof jug and scoop out 1-2 cups of the pasta water.
Prawns: start by twisting the heads off the prawns then pull the tails off and remove the shells. Next use a knife to cut along the back of the prawn and remove the digestive tract. Then repeat this process for the rest of the prawns.
Cook prawns: place a large sauté pan on the stove top, turn the heat to high and add the peanut oil. Pour in the peanut oil, add the raw prawns, salt and pepper. Cook the prawns for 3-4 minutes using a wooden spoon to move them around in the pan as you go. Once the prawns are cooked (bright orange colour with no white flesh) transfer them to a paper towel lined bowl.
Combine: without rinsing or cleaning the pan that the prawns were cooked in add the hot drained pasta and dollop in the pesto. Then measure and add in ½ cup (125ml) of the pasta water. Next take a wooden spoon and toss and stir till consistently combined. Once it is add the cooked prawns back to the pan and gently fold them in, allowing them to get coated in the pesto sauce and heat through.
To serve: garnish the pasta with black pepper, a sprinkling of parmesan cheese, some basil leaves and lemon wedges to serve. Portion into bowls and provide forks and spoons.