Combine all ingredients in a bowl and mix until well combined.
Set sauce aside.
Preheat cast iron skillet or any skillet with enough avocado oil to lightly grease the bottom of the skillet over medium-high heat
Add the onions and saute for 2-3 minutes or until onions start to soften
Once onions have soften, scoot onions the the middle of the skillet, and then place the thinly sliced beef around the perimeter of the skillet. Let the beef sit for a couple minutes and then scoot the onions to the perimeter of the skillet alongside the beef.
Next add the rice to the middle of the skillet where the well was created.
Top the rice with the butter (the more butter the more rich and decadent the dish) and then add the corn and green onions on top.
Add the Beef Pepper Rice sauce to the skillet and then mix everything together until well combined.
Evenly spread the rice on the skillet and let sit for a couple of minutes to form some char on the rice and steak.
Mix until everything is cooked through. Optional: add additional ground black pepper to taste and garnish with green onions
Serve hot!