Line each fillets with as much spinach as you can and roll.

If this is too tedious you can layer like lasagna.

Place side by side-touching-in a glass casserole dish. 

Sauté the onion until clear add garlic a cook but don’t brown.

Add sherry and nutmeg and bring to a boil.

Pour over the cod/spinach, cover and bake at 350 degrees F. for 20-30 minutes.

Serve with rice or pasta.