Portobello Cheesesteak Sliders are a delicious vegetarian alternative to the classic. Savory mushrooms, melted cheese, and toasted buns make these sliders irresistible.
Heat ½ tablespoon of olive oil in a large skillet over medium high heat. Add the portobello slices and cook for 5 minutes, stirring occasionally, until caramelized. Transfer the mushrooms to a plate and set aside.
Heat the remaining oil in the skillet. Add the onion, red bell peppers, and jalapeno slices and cook for 5 minutes, stirring occasionally, or until the vegetables are softened and begin to caramelize.
Return the mushrooms to the skillet and stir in the soy sauce and steak sauce. Cook for 2 minutes, or until vegetables have absorbed most of the liquid.
Turn off the heat and season with salt and pepper (if using). Divide the vegetables into 4 piles in the skillet and top each with a slice of cheese. Serve each portion on a toasted roll.