Sheet pan/baking tray meals are all about convenience, ease, and maximum flavor. This vegan fajita bowl checks all those boxes.
Meanwhile toss mushrooms with another tablespoon of oil and the remaining smoked paprika and another pinch or two of salt. Take pan out stir onions and peppers around, pushing them to one side of the pan without crowding each other too much. Place mushrooms on the empty half of the tray and put back in the oven for 7-10 minutes. Remove when everything is softened and browned in spots.