Preheat your cast iron skillet over medium heat and add a touch of olive oil in there. When it's nice and hot add your diced pork jowl (about 3 ounces). Lower the heat to medium low and cook until browned and crispy. Dry on paper towels.
Prepare 1 cup of Spanish rice, undercooked by a few minutes.
Dice up about 4 ounces of white mushrooms.
In a large mixing bowl combine the mushrooms, diced pork jowl, 1 pound of uncooked ground beef, and 2 tbsp of Worcestershire sauce. Mix and mush it all together until blended evenly.
Next add in 1 can of lightly drained Rotel, and the undercooked Spanish rice. I used a fork to mix it all together at this stage. Now shred in about 2 ounces of cheddar and 2 ounces of pepper jack cheese. Again, use the fork to get it all mixed evenly.
While everything is getting close to being wrapped up, go ahead and preheat your skillet in the oven to 350°
Lay the bell peppers on their sides and slice off the tops.
Fill the peppers to the top with the filling mixture. Pack everything in there nice and tight, and transfer them into your skillet. Top with a little more of the cheeses.
Pop them into the preheated 350° degree oven for about 45 minutes.
Carefully slice them in half, then top with a little more cheese and some cracked black pepper.
Enjoy!