preheat grill to medium high heat
mix together the spinach, mushrooms, peppers and gorgonzola cheese to use as stuffing. Save until needed.
clean away any membranes, fat or silver skin from pork tenderloins
slice tenderloin down the middle long way.
using a meat hammer, lightly pound the pork tenderloin out to make a larger surface for stuffing.
divide stuffing mixture between the two pork tenderloins evenly. Then roll each tenderloin up completely sealing the stuffing.
use toothpicks, or small wooden skewers to seal the edges of the meat. You can also use butchers twine, just be sure to soak it in water so it doesn't burn up on the grill.
season stuffed pork with sea salt and black pepper liberally. You can also use your favorite rub or spice blend.
brush the grill with oil before placing the stuffed tenderloin on the grill. This will help to keep it from sticking. Place the pork seam side down and allow to grill for 7-10 minutes before turning.
Grill on the other side for about the same time. Use a grill thermometer to make sure the inside temperature is a minimum of 165 degrees.
serve with your favorite grilled vegetables