Preheat grill to medium-high heat. Spray grill with nonstick nonflammable cooking spray.
In a large saucepan, melt 2 tablespoons butter over medium-low heat. Add onions, and cook, stirring frequently, for 20 minutes, or until onions are caramelized. Remove from heat, and set aside.
In a small bowl, combine 1 stick of butter and Gorgonzola; cover, and refrigerate until ready to use.
Sprinkle fillets evenly with salt and pepper. Grill fillets, covered with grill lid, for 4 to 6 minutes per side, or until desired degree of doneness. *Cook's Note: For a rare doneness, cook steaks on each side for 3 to 4 minutes. Transfer to serving plates and let sit for 5 minutes. Serve fillets with caramelized onions and Gorgonzola butter.
A viewer, who may not be a professional cook, provided this recipe. The Food Network Kitchens chefs have not tested this recipe and therefore, we cannot make representation as to the results.
Recipe courtesy of Dustin Wall