3 spring onions, sliced
100g tin sweetcorn, drained
600g/1lb 5oz pasta shapes such as fusilli, penne or farfalle
50g/2oz plain flour
2 x 185g tins tuna in spring water, drained
陆 tsp mustard powder
50g/2oz butter
200g/7oz extra-mature cheddar, grated
600ml/20fl oz milk
100驳/3陆辞锄 peas