Carne Asada Torta

2 lbs flank steak
Marinade:
1/4 cup chopped cilantro
1/4 cup orange juice
2 Tbsp Worcestershire sauce
Lime juice and zest
4 cloves garlic
1 tsp cumin
2 tsp chili powder
2 tsp paprika
1 Tbsp salt
2 tsp black pepper

1 can pinto beans
1/2 white onion
1 jalapeño
2 cloves garlic
1 tsp cumin
1 tsp chili powder
1 tsp oregano
Salt and pepper to taste
Around a cup of veggie stock

2 avocados
1 cup sour cream
1/4 cup cilantro
1 lime zest and juice
1 tsp garlic powder
Salt and pepper to taste

4 Torta breads
Tomatoes and lettuce to taste