Pre-washed spinach + walnuts + olive oil = 5 minute pesto. I had a stash of leftover spinach and a sudden inspiration to make pesto. If you have a blender or food processor, it literally takes 5 minutes to whip together homemade pesto. First, I blended the spinach leaves, then added walnuts, then olive oil, salt and two crushed cloves of garlic. One batch for the fridge, and one for the freezer. Fresh, easy, and will be delicious with a variety of pasta dishes.