Traditional Hungarian Goulash

Name: Traditional Hungarian Goulash
Ingredients: 4 slices good quality slab bacon; 2 1/2 pounds marbled boneless beef chuck; salt; freshly ground black pepper; 2 large yellow onions, cut into-inch pieces; 1/4 cup good Hungarian sweet paprika; 2 tablespoons tomato paste; 1/4 teaspoon caraway seeds; 2 tablespoons apple cider vinegar; 4 pounds Yukon gold potatoes but into 1/2-inch dice; 1 large green bell pepper, deseeded and cut into 1/2-inch dice; 2 teaspoons fish sauce; fresh parsley, finely chopped, for garnish