Preheat oven to 375 F. Heat rice according to package directions.

In large bowl, mix rice; chicken; salt; cayenne, if desired; and breadcrumbs.

Use cookie scoop or hand roll chicken mixture into balls. Place on aluminum foil-lined sheet tray, leaving small space between each ball. Bake 25 minutes, flipping meatballs halfway through.

Slice hoagies in half, lengthwise. Remove some bread from middle to make room for meatballs. Butter inside of each hoagie and place on sheet tray.

Once meatballs are cooked through, turn broiler on high and place buttered hoagies in oven. Cook 1 minute, or until butter is melted and hoagie has browned.

Remove hoagies from oven, place 3-4 meatballs inside (depending on size) and cover with slice of cheese. Broil on high 30 seconds to melt cheese.

Drizzle garlic sauce on top.