Quick Sous Vide Ginger Soy Chicken

Ingredients

• 1/2 cup minced onion
• 1/2 cup plus 2 tablespoons vegetable oil
• 1/4 cup rice vinegar
• 2 tablespoon ketchup
• 2 tablespoons minced fresh ginger
• 1 1/2 tablespoons soy sauce
• 1 1/2 teaspoons light brown sugar
• 1 teaspoon celery salt
• Salt and freshly ground black pepper
• 4 (8- to 10-ounce) boneless, skinless chicken breasts
• 1/4 teaspoon sesame oil
• 1/3 cup panko bread crumbs
• 1 tablespoon wasabi furikake
• Steamed white rice, for serving
• Chopped scallions, for serving (optional)