Preheat the oven to 180°C/gas 4.
Cut the fish into approx. 3cm chunks.
Mix the fish with the crème fraîche in a medium bowl.
Add the zest and juice of the lemon to the fish.
Season with the herbs, remove a portion for baby, then add salt and pepper (for toddlers and adults) and set aside.
Use the top of a mug to cut out discs of pu pastry and set aside. Pour the fish mixture evenly into 4 ovenproof mugs.
Place a pastry disc on top of each mug.
Bake in the oven for 20–30 minutes, or until the fish is cooked through and the pastry is golden.
Recipe taken from Baby at the Table by Michela and Emanuela Chiappa