Here in New England, summer -- and everything in the garden -- comes crashing down, literally, in the first two weeks of September. Ripe peaches plop from the trees, and we hurry to scoop the last tomatoes off the vines before they fall and rot. No one wants to give up on summer, so if you're in denial, like I am, try these roasted shrimp tacos with ultra-fresh avocado peach salsa. Juicy tomatoes and peaches, and creamy avocado, dribble down your chin, in a way that makes you believe that summer can go on forever. I always have shrimp in my freezer, but if you have scallops or salmon or other mild fresh fish, go ahead and substitute. A few pickled jalapeños on top, or extra cilantro, would be great. Pack these tacos to go, for an end-of-summer beach party or picnic.