Homemade Christmas Chips - Sarson's

Ingredients

• 1 tbsp olive oil
• 1 clove of garlic
• 4 x 400g tins of plum tomatoes
• 100ml Sarson’s Distilled Malt Vinegar
• 100g sugar
• 1 cinnamon stick (optional)
• 5 Maris Piper potatoes, peeled and chopped
• 1 large onion, grated
• 1 egg, beaten
• 2 tbsp plain flour
• 2 tbsp rapeseed oil
• Salt and ground black pepper
• Sarson’s Malt Vinegar, to dress