Hot dogs with New York-streetcart onions | Sainsbury`s Magazine

Ingredients

• 1½ tsp olive oil
• 4 large onions, thinly sliced
• 325ml tomato juice
• ½ tsp celery salt
• 1 tbsp tomato purée
• 1½ tsp smoked paprika
• 1 tsp sugar
• ½ tsp cornflour
• ½ tsp crushed dried chilli flakes, or more to taste
• 4 tbsp cider vinegar, or to taste
• 12 jumbo frankfurters
• 12 jumbo hot dog rolls, split