Monday’s Leftovers: Mixed-Pepper Steak With Onions

I like to get my week off to the right start by making a square meal at home, but Mondays often wind up being hectic and frazzled. Thankfully, I've come across a dish that pleases everyone, doesn't require too much time or effort, and calls for only a handful of ingredients, including sirloin, which I have on hand . It reminds me of the pepper steak my mother made for me growing up. There's no fancy herbs, no exotic spices or wine reductions - just soy sauce, and the pure, pungent aroma of grou