Place pasta in a pot of salted boiling water to cook and set aside
In a food processor, blitz your peas, spinach and clove of garlic with a tablespoon of olive oil. If you don't have a food processor, you can bash, mash and chop.
Once blitzed, mix the basil pesto through and season with salt and pepper.
Set aside. Just before you remove pasta from the heat, collect half a mug of the pasta water. Do not throw this out - it's gold.
Strain pasta and return to the pot. Mix through the pesto and add some of the reserved pasta water back to the pasta to loosen the sauce.
Season with a drizzle of olive oil, salt and pepper, parmesan and lemon if desired.