Preheat a large, heavy bottomed pan over medium heat (cast iron is preferred.) Saute the shallots in olive oil and a pinch of salt until translucent, about 3 minutes. Add garlic and saute about 30 seconds more. Season with black pepper and salt. Add asparagus and toss to coat. Cook for about 2 minutes, then add nectarine, and cook for about 5 more minutes. The asparagus should be a bright Kermit green, and the nectarine should release some of it’s juices.
Add beans and toss to coat. Cook until they are warmed through, about 2 more minutes. Taste for salt. Turn off heat and let sit for 5 minutes or so, so that the flavors can meld.
In the meantime, prepare red lettuce leaves. Just peel off the good big ones, rinse and dry them.