Step 1) Heat corn oil in a large nonstick skillet over medium high heat. Add pork and cook until pieces are nicely browned on all sides. Add onions, poblano pepper and garlic. Cook 3 to 5 minutes or until onions are softened. Stir in brown sugar, ancho chile, chipotle chile and cumin. Cook an additional 2 minutes. Add tomato bouillon and water. Bring to boil; reduce heat, cover and simmer on medium low 35 to 45 minutes or until pork shreds easily and most of the liquid has evaporated.