Cook rice according to package instructions and keep warm.
In the meantime, in a small saucepan, add ½ of the jar of hoisin sauce, vinegar, pineapple juice from the can of pineapple, honey, garlic, ginger, soy sauce, red pepper flakes and mix well. Bring to a boil, turn down to a simmer and cook for 3 minutes. Set aside.
In a large nonstick pan or wok, heat 1 teaspoon oil over high heat. Add beef and stir-fry until browned, about 3-4 minutes.
Add red bell pepper, scallions, edamame, pineapple chunks, and saute for 1 minute. Add sauce and mix well. Cook for 1 more minute.
To serve: place ¾ cup brown rice on each plate or bowl and spread out. Top each with 1 cup stir-fry.