Okay, I am not reinventing the wheel here. In terms of using leftovers this is about as simple and old-fashioned as you can get, but it’s easy and satisfying. Make sure you season the sauce properly, that’s key; you might need to add a little bit more mustard than stipulated. It’s very easy to adapt this recipe too: replace the fennel with blanched broccoli or leeks, or add a layer of spinach.
75g2¾oz pancetta, cut into chunks, or bacon lardons
15g½oz unsalted butter
3tbspplain flour
100ml3½fl oz dry white wine
250ml9fl oz whole milk
½tspEnglish mustardor to taste
salt and pepper
85g3oz grated Parmesan
2tbspdouble creamoptional
375g13oz cooked chicken, torn into pieces
Instructies
Trim the fennel bulbs (reserve any little feathery fronds) and remove any tough outer leaves.
Quarter and remove the core in each piece.
Cook the fennel – microwave, steam or boil in a little water – until it has lost its hardness but is not tender all the way through.
Drain really well.
Sauté the pancetta or bacon in its own fat.
Preheat the oven to 190°C/375°F/gas mark 5.
Make a white sauce by melting the butter and stirring in the flour to form a roux.
Cook over a low heat for a couple of minutes, then take off the heat and start adding the wine a little drop at a time, stirring well after each addition to make sure the liquid is well incorporated and the mixture is lump free.
Gradually add the milk in the same way.
Return to the heat and bring to the boil, stirring all the time.
The sauce will thicken.
Once it is boiling, reduce the heat and let it simmer for about four minutes to cook the flour.
Add the mustard, seasoning and Parmesan and, once the cheese has melted, the cream (if using).
Lay the fennel in a gratin dish, season, then top with the chicken, bacon and any little fennel fronds you collected.
Pour the sauce over the top and bake in the hot oven for 20 minutes, or until bubbling and golden.