Preparation
-Cook the pasta in salted water
-Heat the contents of the jar in a non-stick pan
-Turn everything with a wooden spoon and bring to the boil for a couple of minutes, then turn off the heat.
-Separate 4 teaspoons of sauce from the pan and set aside.
Drain the pasta al dente and add it to the remaining sauce
-Mix everything well
-Plate, garnishing with the teaspoons of sauce set aside previously and, if desired, a sprinkling of fresh parsley and chopped pistachios.