Flat Iron Steak Recipe Crock Pot

Ingredients

• 2 pounds flat iron steak (trimmed of excess fat)
• 1/4 cup olive oil
• 1/4 cup soy sauce
• 2 tablespoons balsamic vinegar
• 2 cloves garlic (minced)
• 1 tablespoon Worcestershire sauce
• 1 teaspoon freshly ground black pepper
• 1 large onion (sliced)
• 2 large carrots (peeled and cut into chunks)
• 2 stalks celery (sliced)
• 1 cup beef broth
• 2 sprigs fresh rosemary
• 2 sprigs fresh thyme
• 1 teaspoon salt
• 1 teaspoon smoked paprika
• 1/4 teaspoon crushed red pepper
• 1 tablespoon brown sugar
• 1 tablespoon tomato paste