Cook the rice according to the directions on the package. Drain any excess water if necessary. Set aside.
Preheat the oven to 350 degrees. Lay the sliced wonton on a foil lined baking sheet and cook in the oven until golden brown and crispy. Remove from the oven and set aside in a bowl.
Season the steak with salt and pepper on both sides. (If you desire a particular temperature on your steak cook it whole, if you prefer it medium well or well done then slice it prior to cooking) Optional: Heat half of the olive oil in a nonstick pan on medium heat. Nicely char the steak on both sides to your desired temperature using a thermometer. Set aside to rest for 5 minutes or right before serving and slice it against the grain.
Heat a nonstick pan on medium-high heat. Add the oil and saute the celery, onions, and carrots until they start to soften. Add in the garlic and ginger. Saute until very fragrant. (If using sliced sirloin add to the pan and cook until nicely browned).
Stir in the sesame oil, then stir the cooked rice to the pan. Saute for 1 to 2 minutes then add scallions, rice wine vinegar, and soy sauce. Mix together well and saute until the liquid mostly evaporates and flavor concentrates.
Mix in the sliced steak (if cooked separately). Portion and serve. Garnish with scallions and crispy wonton.