Macaroni cheese chorizo bake recipe

Name: Macaroni cheese chorizo bake recipe
Prep time: 20 min
Cook time: 1 h
Total time: 1 h 20 min
Cuisine: European, American, Spanish, Mediterranean
Ingredients: 1kg macaroni; 1 tbsp olive oil, plus a splash; 2 onions, finely chopped; 225g Tesco Finest chorizo ring, skin removed and roughly chopped; 25g butter; 3-4 tbsp plain flour; 1ltr whole milk; 400g extra-mature Cheddar, grated; 1 tsp smoked paprika, plus extra for the topping