Chicago-Inspired Italian Beef Sandwich

Ingredients (16)

• + 1 ½ pounds boneless beef chuck, cut into 2-inch pieces add to pantry
• + salt and ground black pepper to taste add to pantry
• ✓ salt and ground black pepper to taste
• + 1 tablespoon vegetable oil add to pantry
• ✓ 6 cloves garlic, sliced
• + 2 tablespoons white vinegar add to pantry
• + 1 tablespoon dried oregano add to pantry
• + 1 teaspoon dried thyme add to pantry
• ✓ 1 teaspoon dried rosemary
• + 1 teaspoon freshly ground black pepper add to pantry
• + 1 bay leaf add to pantry
• + ¼ teaspoon red pepper flakes, or to taste add to pantry
• + 3 cups chicken broth, or as needed add to pantry
• + 4 ciabatta rolls, sliced in half add to pantry
• + 1 cup chopped giardiniera (pickled Italian vegetables) add to pantry
• + 2 teaspoons chopped fresh flat-leaf parsley add to pantry