I have written about this recipe before, but it is worth repeating. Rocket pesto (or ruccola pesto) is so tasty, and lot cheaper to make than basil pesto! This recipe is from 'The Vicar's Wife's Cookbook' by Elisa Benyon:
50g pine nuts (roasted in a dry frying pan)
1-2 cloves of garlic, peeled but left whole
zest of 1-2 lemons
125g rocket (I use less than this)
ca 100ml olive oil
70g grated Parmesan or Grana Padano
Put the ingredients into a food processor (or a pestle and mortar) and put it on full speed until you have a sloppy pesto (not runny). I never follow the measurements to the point, it all depends on how you prefer it- I prefer more garlic and less lemon. Taste it and maybe add some more olive oil until it looks and tastes right.
This pesto is lovely with spaghetti and prawns, or on bread with ham and avocado. Or cut open a couple of chicken breasts and fill them with it, and bake in the oven with a bit of mozzarella on top.