1. Preheat the oven to 220°C/ 180°C fan, and line 2 large sheets with baking parchment.
2. Place approx. 75g of the crumbled Extra Mature cheddar in 15 cm wide circles in the centre of each sheet. Bake in the oven for 10 minutes until light golden brown.
3. Remove from the oven and allow to cool for 2 minutes, then carefully lift up the paper to bend into a taco shape, place into taco holders allowing them to fully cool and set into a taco shape.
4. Heat 1 tbsp of oil in a large frying pan and add the beef mince and 1/2 tsp salt. Using a wooden spoon to break up the meat, fry for 8 minutes until brown.
5. Add the smoked paprika, onion granules, garlic granules and tomato ketchup and cook for a further 2 minutes.
6. Add 100ml of beef stock and simmer for 5 minutes until the sauce has thickened. Season to taste!
7. Combine all the ingredients into a bowl, season to taste. Set aside.
8. In a small bowl or glass jar add 1 red onion finely sliced, the red wine vinegar, the sugar and salt. Mix to combine and set aside until ready to serve.
9. Take a cheese taco and fill generously with the beef mince.
10. Top with the pickled onions, sliced pickles, tomatoes, iceberg lettuce and finally an extra sprinkling of Castello® Tickler Extra Mature Cheddar cheese!