This is an easy side dish. It goes well with steak, this recipe is, as far as I know, my own. It was created by my mother, who when she married my father, hadn't had onions while my father hadn't had mushrooms. The pepper part is a latter addition, by me. As with any recipe calling for any type of pepper, feel free to substitute. For instance, if you like jalapenos, substitute 2 to 3 jalapeno peppers for the bell pepper(s).