Method

1. Toast the pistachios: In a dry skillet, lightly toast the pistachios until fragrant. Let them cool completely before processing.   
2. Prepare the pasta: Cook the pistachio pasta according to package instructions. Reserve about 1 cup of pasta water.
3. Make the sauce: While the pasta cooks, heat a large skillet with a drizzle of olive oil over medium heat. Sauté the onion and garlic until softened.
4. Create the pistachio cream: Add the toasted pistachios to a food processor and pulse until finely chopped but not completely smooth. Add the pistachio paste to the skillet with the onion and garlic.
5. Combine ingredients: Pour in the heavy cream and milk. Bring to a simmer, stirring constantly. Let the sauce thicken slightly.
6. Finish the pasta: Add the cooked pasta and reserved pasta water to the sauce. Toss to coat evenly.  
7. Serve: Stir in the Parmesan cheese and season with salt and pepper to taste. Serve immediately.

Optional Additions:

• For a richer flavour, add a splash of white wine to the sauce.
• Top with fresh basil or pine nuts for added texture.
• Serve with grilled chicken or shrimp for a complete meal.