Make-Ahead Smoked Salmon Roll-Ups

2 3-ounce packages thinly sliced, smoked salmon (lox-style)

4 10-inch spinach-flavored flour tortillas

2 tablespoons rice vinegar

1/4 cup mayonnaise or salad dressing

teaspoon cayenne pepper

1 medium avocado, halved, seeded, peeled, and sliced

2 teaspoons sugar

2 tablespoons toasted sesame seeds

1/2 of a medium cucumber, halved lengthwise, seeded and cut into thin sticks

1 teaspoon salt