COOK IT.
Cook the portobellos and onions at 375º for 8-10 minutes.
Once the mushrooms and onions are nice and hot, shift them to the other side of the grill (without burners on) to keep warm. We are wanting to give them a good finish on the grill, without charring them too much. The Nexgrill topper is great for this!
With your main heat zone around 375-400º, place burger patties onto grill over direct heat.
Cook the burgers on each side for about 3-4 minutes. Flipping them halfway through.
After flipping your burger patties, place your burger buns on the top warming rack of your Nexgrill to give them a nice toasted finish. These should take only 2-3 minutes and be done after you’ve turned your burger patties.
Add your American Cheese to the tops of the flipped burgers and close the grill for the last 2-3 minutes.
It’s almost chow time! Remove your toasted buns and put them on a serving plate. Top the base of the bun with a serving of the onions first, followed by the burger with melted cheese, and lastly the Porto Cap on top!
DIG IN!