Just throw some basil, parsley, sliced almonds, grated Parmesan cheese and olive oil into small blender and blitz.  You can add a little garlic if you like but my boys like this simpler version.  Adjust the consistency with more olive oil as required.
Drain the pasta and reserve a little of the cooking water.  Mix the pasta, a little pesto and add a few drops of the cooking water to enrich the sauce and help it stick to the pasta.  I don't use much of the pesto and take the time to stir it through the pasta rather than drowning it in sauce.  Serve with a good grating of Parmesan cheese on top.
 Quick, delicious and happy children all around!