Bring a pot of generously salted water to a boil, and cook your pasta according to package directions. Drain it,

Add the cashews to your food processor and pulse a few times until crumbled.

Add the spinach, basil, lemon juice, salt, and pepper, and continue to pulse.add olive oil.
more lemon juice to taste if desired. and set aside.
spinach pesto pasta:

In a large pan, heat butter over medium heat. Add the onion or shallot and a sprinkle of salt. Continue to cook, stirring occasionally, until the onion is softened and browning slightly

Add the garlic and cook for just about 60 seconds more, stirring occasionally, until the garlic is fragrant.

Add the cooked pasta, r, and pesto and fold everything together gently. Reduce the heat to medium-low and cook, stirring frequently, until the sauce has thickened slightly and clings to the pasta,.

Ready to eat