1 Little Gem lettuce
4 sweet potatoes (800g/1lb 12oz total)
2 tbsp tomato ketchup
25g/1oz plain flour
salt and black pepper
3 tbsp olive oil
1 tsp smoked paprika
1–2 thick slices of wholemeal bread (roughly 80g/2¾oz)
15g/½oz cheddar or Parmesan cheese (optional)
1 large free-range egg
4 heaped tbsp natural yoghurt
4 x 120g/4oz salmon or cod fillets, skinless and pin-boned
4 submarine bread rolls