What To Do:
1. Cook the Mushrooms: Heat ½ packet Southwest Ranch in a large, heavy skillet over medium-high. Add mushrooms to skillet. Season with salt and pepper. Cook, tossing, until tender, 3-5 minutes. Transfer mushrooms to a plate.
2. Cook the Peppers: Add ½ packet Southwest Ranch and peppers to the skillet. Cook, tossing, until tender, 3-5 minutes. Stir in reserved mushrooms with their juices. Remove from heat.