Directions

1. Preheat outdoor grill for medium heat, and lightly oil the grate.
2. Rub the papaya slices evenly with 2 teaspoons olive oil.
3. Cook the papaya on the preheated grill until hot and softened, about 10 minutes.
4. Blend the grilled papaya, garlic, and butter in a blender until smooth. Pour into a small container and cool in refrigerator 1 to 2 hours.
5. Again preheat outdoor grill for medium heat and lightly oil the grate.
6. Rub the porterhouse steaks thoroughly with the 2 tablespoons olive oil. Stir the rosemary, salt, pepper, and garlic salt together in a bowl; rub evenly onto both sides of the steaks.
7. Cook the steaks until they are beginning to firm, and are hot and slightly pink in the center, about 8 minutes per side. An instant-read thermometer inserted into the center should read 140 degrees F (60 degrees C). Top with the papaya butter to serve.