First, rinse the parsley leaves. 30g/1oz flatleaf parsley leaves (no stalks) 1-2 garlic cloves, crushed; 40g/1½oz freshly grated parmesan; 30g/1oz pine nuts; 75ml/2½fl oz extra virgin olive oil; salt; Method. How to make parsley pesto with walnuts – step by step. You don’t want to end up with pieces of soil in your food. That is why I recommend taking time when washing them. This recipe is part of the recipe for Pesto Cheese Wreath. The whole process only takes a few minutes. Makes about 1/2 cup. Ingredients Save this Parsley "pesto" recipe and more from How to Cook Everything: Simple Recipes for Great Food to your own online collection at EatYourBooks.com Yield. I usually buy a bunch of leaves that are sometimes dirtier than usual. Parsley-Basil Pesto the Editors of Publications International, Ltd..