Machaca Chimichangas

Ingredients

• ["1 tbsp Worcestershire sauce", "1 tbsp soy sauce", "2 tbsp water", "4 tbsp lime juice", "1 tbsp dried oregano (preferably Mexican)", "1 tsp ground cumin", "4 cloves garlic (peeled)", "1 serrano pepper (seeded)", "2 tbsp olive oil", "1 tbsp salt", "1 tsp black pepper", "2 lbs skirt steak", "peanut oil (or other neutral oil)", "1 large yellow onion (diced)", "2 serrano peppers (seeded, diced)", "2 red bell peppers (diced)", "3 cloves garlic (peeled, minced)", "28oz diced tomatoes", "1 cup beef broth", "1 tbsp dried oregano (preferably Mexican)", "1 cup Cotija cheese (grated; or substitute Parmesan)", "8 tortillas (10\")""