In my garden it is WAY easier to grow spinach than basil. I usually grow basil in big pots so I can keep and eye on it but have masses of spinach out in the garden. So, when I make pesto, I find that cutting at least 50/50 with spinach makes the basil go much farther, you can barely tasted the spinach especially if you like your pesto garlicky and cheesy. I try to keep jars of it in the fridge to make quick pasta meals when it's hot and all else fails.
