What more is there to say? It's the straight-up classic, Genovese basil pesto that I make quite often. It freezes well. Use it in soups. Roast vegetables with it. Spread it on sandwiches, fish, meat. Of course, add it to pasta.
Leeks, spinach and arugula are always around, and when you puree them, fold them into little doughy pockets and float them in a light broth, you can fake it (spring) until you (it) make it (actually shows up).
This stuffing will win you over from your current go-to, I'd put money on it. I'm thiiiiis close to getting James to agree to make it this year instead of his version which he's staunchly stood by his whole life!
If you think you need to pay tribute to a great summer before it's gone, and to enjoy a meal that is decidedly summer before diving into squash pasta or a heap of leaves, this will be the perfect send-off salad for you too.