Preheat oven to 170°C.

Heat butter in low heat in pan. Whisk in flour, nutmeg, paprika and white pepper. Add in milk slowly and stir until smooth.

Add in cheddar and stir for 1 minute until all cheese have melted. Set sauce aside.

In a baking dish, place spinach.

Cut up fish into small pieces and arrange on top of spinach and pour sauce all over. Sprinkle parmesan on top.

Bake for 20 minutes.

For adults, serve with rice. For babies 8 months and above, blend / pulse to desired consistency.