while rice is cooking, in a large skillet brown the ground beef over medium heat. remove from heat and drain the fat and place beef in a bowl.
place skillet back on medium-high heat and add sesame oil, garlic, and green onions. stir fry for 2 minutes. add the broccoli slaw, water chestnuts, and coles slaw mixture and stir fry for 2 minutes. add the cooked rice and soy sauce and stir fry for 2 minutes.
add the ground beef back into the mixture and add red pepper flakes. stir fry for 2 minutes or until well combined or heated through.