
First, wash and prep the shrimp by deveining them if needed.
Bring a large pot of water to a boil and salt it well. Add your pasta and cook until al dente
To make the pesto, put the pistachios, basil, garlic and olive oil in a food processor and blitz to a paste, add more oil if needed. The paste should be thick with some medium-sized chunks of nuts. Set aside.
Heat a large pan on a medium-high heat with around 2 tablespoons of olive oil. Add the shrimp and cook on both sides until pink and cooked through (only about a minute or so).
Add the pistachio pesto with ½ cup (125ml) of reserved pasta water and stir through until dissolved into a sauce. Add more reserved water if needed (another ½ cup or 125ml).
Finally, add the cooked spaghetti and stir through to coat in the sauce. Serve with more chopped pistachios for serving if desired.