In a heated saute pan, add oil and let warm. Add onions, shallots, garlic, and crushed red pepper and cook on medium high heat until onions start to sweat. Add mushrooms, salt, and pepper and stir frequently. Once mushrooms are about halfway cooked (3-4 minutes), add shaved steak, stirring frequently so the meat does not clump together.
Cook until steak is cooked through, then add teriyaki sauce and prepared rice. Mix until rice is heated through and teriyaki sauce has just started to caramelize the rice.
Add salt and pepper to taste and enjoy!
Notes
For the rice I like to cook mine with crushed red pepper, salt, and pepper to add flavor to the dish. This is optional but I like the extra kick of heat it gives.This recipe is for individual portions so increase the servings as necessary.