What you will need:
Couple Leftover Bratwursts
Shredded Cheese of your choice (I used Mexiblend)
BBQ Rub (I used Wolfe Rub Bold)
Remove stems from mushrooms and place a 1" thick slice of bratwurst in the center.
Sprinkle with Rub
Cover with cheese and bake in a 350º oven until the cheese is melted