Cook the pasta according to the package instructions, reserving 1 cup of the pasta water before you drain the water
Rinse the pasta with cool water.
In a large bowl, mix together 1/4 cup reserved pasta water with the pesto.
Add the pasta, tomatoes, mozzarella, cucumber and pine nuts and mix until combined.
Add salt and pepper.
Serve chilled or at room temperature.
Refrigerate in an airtight container for up to 3 days.
Notes
The best ingredients will give you the best results, so get the best-tasting pesto if you’re using store-bought and use the freshest ingredients if making your own pesto sauce.
Rinsing the pasta under cool water stops the cooking process, so you have perfectly cooked al dente pasta. Otherwise, it could turn mushy.