Cook buckwheat pasta according to instructions – drain & set aside.
If using zucchini noodles, spiralize and blanch for 1-2 minutes in boiling water until just tender. Drain and set aside.
While pasta or zoodles are cooking, add oil to frying pan or skillet and stirfry chicken or skip this step for vegan.
If needed add some extra oil to frying pan or skillet and stirfy vegetables until they just start to soften.
Place pasta, chicken (if using) and vegetables into a large mixing bowl.
Add pre-made pesto (see link above for recipe) and mix using a large wooden spoon or pop on a pair of food-safe gloves and massage pesto through the pasta – veggie mix until everything is well covered.
Grate parmesan and place it in a small bowl. Have this on the tables so that those that love parmesan can add a generous sprinkle. Or leave off for DF or vegan option.