In a heavy-bottomed saute pan, heat oil and butter over medium-high heat. Add onions, bell peppers, and celery and saute about 5 minutes or until vegetables are softened. Last minute or so add the garlic. Add the beef and pork and saute until cooked through and most liquid has reduced down. Reduce to a low simmer and cook for about 60 minutes. Add small amounts of broth as necessary to prevent sticking. Season to taste with salt, pepper and Tony's. Remove from heat and let cool. You want your filling to be room temperature but not hot. If it is too hot it will make the pastry dough soggy. Number of servings will depend on how you cut the dough.
To Bake: Preheat oven to 400 degrees F. Spoon a generous portion on each Goya wrapper. Prepare egg wash by whisking together egg and water and brush it around the edge of each round, fold over and press edges together with a fork. Place the meat pies on a greased cookie sheet or pan. Make a couple of small slits in the dough so the steam will vent out, brush some of the egg wash over each pie and bake in a 400 degree oven for about 30 minutes or until golden brown.