Bring a large pot of water to a boil. Once boiling, add salt and cook the pasta according to package instructions.
While that’s happening, place a large sauté pan on medium heat and toast the garlic in the olive oil until golden and fragrant. Then remove it from the pan so it doesn’t burn.
Cook the green peas by boiling them in a separate pot if fresh, or microwaving them if frozen.
Blanch the spinach and basil leaves in the boiling pasta water for 30 seconds. Use a large slotted spoon to transfer to an ice bath.
Reserve 2 cups of pasta water and drain the rest when the pasta is finished cooking.
To the bucket of a high power blender, add the peas, spinach and basil leaves, garlic and olive oil, the juice of 1 lemon, and the parmesan. Add a pinch of salt and enough pasta water to blend, about ⅓ cup.
Pulse the mixture until it is completely smooth.
Add the cooked pasta and the sauce back to the large sauté pan over medium-low heat. Gently stir to coat all the pasta in sauce. Add pasta water if needed to help smooth the sauce, and grate in more parmesan if desired.
Serve immediately and enjoy hot! Top with parmesan cheese, chili flakes, or chili oil.