Goulash Recipe

Name: Goulash Recipe
Ingredients: 2 pounds beef chuck, cut into 1 to 2–inch pieces; 1 cup unbleached all-purpose flour; 1 to 2 teaspoons kosher salt; 1/2 teaspoon freshly ground black pepper; 2 to 3 tablespoons vegetable or other neutral-flavored cooking oil; 2 large onions, sliced; 1/2 cup ketchup or tomato sauce; 1/4 cup apple cider vinegar; 2 teaspoons smoked or sweet paprika; 1/2 teaspoon hot paprika; 3/4 teaspoon ground mustard; 1 tablespoon Worcestershire sauce; 1 tablespoon brown sugar; 1 cup water or beef stock, plus more as needed