Heat olive oil in large skillet over medium high heat. Slice onions into rounds and separate. Add to oil and saute until caramelized about 10 minutes. Add the Worcestershire sauce and beer. Turn heat to medium and let cook until beer has evaporated and the onions are golden. Season with some salt.
Mix the pork with the spices. Shape into patties and fry until done. Top with caramelized onions, cheese and serve on buns with favorite toppings.