Tuna Melt Futomaki Roll

Ingredients (12)

• 1/4 cup medium-grain sushi rice, rinsed under cold water
• 1/4 cup cold water
• 1/4 teaspoon salt
• 1 tablespoon mirin
• 1 teaspoon sugar
• 1 teaspoon vinegar
• 1 (5-ounce) can oil-packed tuna, drained
• 1/4 cup Kewpie mayo
• 2 teaspoons soy sauce
• 2 to 4 nori sheets, as needed
• 4 to 8 American cheese slices, as needed
• 1 dill pickle, cut into thin spears