3 cups sushi rice
1/2 teaspoon salt
1/3 cup rice wine vinegar
2 tablespoons sugar
1 avocado, halved lengthwise, pitted, peeled and cut lengthwise into 1/8-inch slices
3 tablespoons fresh lemon juice
(6) 8 x 7-inch nori sheets
3 cups prepared sushi rice
1 tablespoon wasabi powder, combined with 1 tablespoon cold water, or wasabi paste
2 frozen Alaskan king crab legs, thawed, shelled and thick sections halved lengthwise, or 3/4 pound frozen Alaskan king crab meat, thawed and drained
1 seedless cucumber, halved lengthwise and cut lengthwise into 1/8-inch slices