In a wide pan heat to medium high and add 1 tbsp butter along with a splash of oil. Add the onions and bell peppers and cook stirring frequently until just softened and then set aside.
In the same (now emptpan, add 1 tbsp of oil along with the meat , salt & pepper, red pepper, paprika and garlic powder
Cook for a few minutes until the steak just changes to a brown color (cook to desired donenesbut be careful not to overcook as it will become chewy.
Mix in the onions and bell pepper.
Reduce heat to low and lay the cheese on-top of the meat directly in the pan and let it melt.
Open the buns and toast in a buttered pan then scoop up the meat along with the cheese into the buns and serve immediately.