This is a do-it-yourself pasta sauce, which I consider really versatile. I use whatever is on hand, but my preference is to at minimum have leeks and spinach, hence the title! Add more of whatever you like, omit what you don't. Throw in something new! I'd love to hear what you think and what kinds of tweaks you make to it. <br> I'm posting the way I most recently had it, but the wild leek pesto is a rare treat, it's available to me only in the spring at the farmers' market. I usually don't add any pesto in, but now that I've tried it, I might experiment with others to see what works (arugula might be nice!) Sometimes I add tuna, or slices of the sun-dried tomato tofurky sausages for some protein.