Drop the peas into a pot of boiling water for three minutes, reserve a ⅓ cup of the water before draining then run some cold water over them in the sieve or colander to stop them overcooking.
Gently fry the garlic in 1 tablespoon of olive oil over a medium - low heat for 2 - 3 minutes. Don't let it brown.
Blitz the peas, water, herbs, lemon juice, salt and garlic together until smooth. I use a smoothie maker but you could use a stick blender or regular blender.
An optional step (but recommended!) is to pass the mixture through a sieve with a spatula (see photos and video) to make it smoother.
Mix in the remaining 2 tablespoons olive oil to finished sauce.
Cook your pasta in a pot of well salted water according to package instructions. Reserve a cup of the pasta water before draining.
Gently warm the sauce in a large skillet over a medium - low heat. You don't want it to be bubbling too much.
Add your cooked pasta straight in with a splash of pasta water and toss.
Let it very gently bubble for 30 secs - 1 minute then serve straight away with lots of freshly grated parmesan (or a vegan option), a drizzle of olive oil and some fresh herbs if you desire.