Hawaiian Flank Steak Musubi

Ingredients

• One 1855 Angus beef flank steak (approximately 1 pound)
• One cup flank steak marinade (see recipe)
• Two cups uncooked Japanese sushi rice
• Two cups water
• Two tablespoons soy sauce
• Two tablespoons sugar
• Two tablespoons mirin
• Two European seedless cucumbers, cut in 1/3-inch-thick rounds
• One small, ripe pineapple
• Third-cup Sriracha sauce
• One cup mayonnaise
• One jar (1.7 ounces) furikake seasoning (optional)*
• One bag (.35 ounces) shredded nori (optional)
• One box (approximately two ounces) micro cilantro