Oh, you rebel you… yes, you can, if you must.u003cbr/u003eu003cbr/u003eFresh lemon is ideal because you get the zest (notice u003ca href=u0022https://dontwastethecrumbs.com/kitchen-appliances-you-dont-need/u0022u003eI used a knife and NOT a zesteru003c/au003e), and the zest makes this spinach pesto taste like spring in your mouth. BUT I understand if you don’t have lemons and have a big bag of spinach that’s about to go bad. Priorities.u003cbr/u003eu003cbr/u003eDon’t run out for just a lemon. But do make a mental note the next time you buy spinach and put spinach pesto on your meal plan to buy 2 lemons too.