1 stick celery, finely chopped
1 garlic clove, crushed
1 very small onion (50g/1¾oz peeled weight), finely chopped
40g/1½oz baby spinach
70g/2½oz tinned drained brown or green lentils
1 tsp olive oil
1 medium free-range egg
100²µ/3½´Ç³ú smoked haddock, boneless, skinless