Walnuts add a whole new flavour to pesto, while rocket leaves add a peppery punch!
Parmesan cheese is not truly vegetarian, as it contains animal rennet. To make this dish 100% vegetarian, omit the cheese or find a suitable vegetarian substitute made without animal rennet. In supermarkets look for the 'parmesan style hard cheeses' which are suitable for vegetarians.
This was a little bit too "arugula-y" for me! Maybe it would have been improved by using more basil and less arugula. Also, this should be made with a mildly-flavored olive oil, so that the arugula and olive flavors aren't overwhelming. It's worth a second try, though! - 22 Sep 2002 (Review from Allrecipes US | Canada)
wow--spicy. Tastes great if you like argula. I added cottage cheese and gave one more spin thru the blender to mellow it out a bit. - 13 May 2007 (Review from Allrecipes US | Canada)
LOVED, LOVED, LOVED THIS RECIPE. I had a mix of arugula and baby spinach to use up and have seen this recipe before but never had the arugula. Well tonight was the night for something fast and easy. Also, instead of walnuts, I used what I had on hand that being pecans. Otherwise it was as written and served with penne pasta. Thanks Jessica, it will be made again. - 15 Mar 2011 (Review from Allrecipes US | Canada)