You’ll Need:16 large dried cornhusks 2 red onions, peeled and cut into 3/8-inch slices 2 teaspoons olive oil Salt and freshly ground black pepper to taste 16 jumbo shrimp (about 1 lb), peeled and de-veined Charred Chile Salsa (recipe below) 1 ripe Haas avocado, peeled, pitted and cut lengthwise into