I watched the relevant Hairy Bikers video several times (it occurs during a trip to Normandy, and is a homage to apples, including cider and calvados).
Now, today, I realised that I had no cider, hardly any Calvados, but did have plenty of white wine: Tweak one (as their dish used cider). I used white wine (the remnants of a bottle of French Chardonnay, from the Pays d'Oc), instead.
Tweak two was when it struck me that their video (thoroughly enjoyable though it is) involves three experienced chefs (both Hairy Bikers, - who are manifestly not posh, plus someone who goes by the name of James, who is clearly a posh friend), working briskly - and simultaneously - together to bring the dish to the table.
I didn't have two sous-chefs; since the carer headed off to care for others (since the death of my mother), I haven't even had one sous-chef.
Thus, rather than preparing the potatoes simultaneously (James actually panfries them, and they do look delicious), I thought to prepare them separately, and earlier, as juggling that amount of stuff struck me as the opposite of relaxed cooking, which is what I was after.
And, tweak three: As always: The times the video suggests are......wholly unrealistic; I gave myself a very relaxed hour and a half, perhaps a little more, finally sitting au table at around 9.30 (21.30); then, again, I do like to dine late.
Tweak four: The diced lardons (I used guanciale) went in with the pork fillet, rather than with the potatoes.
Thus: Step/Stage one: Potatoes: Peeled and cut into large - very large - chunks, and parboiled in boiling water, to which I added a chicken stock cube; as I intended to use some of this stock liquid later, I thought to ensure that it was gloriously flavoursome. These were cooked until tender to the point of a knife.
In a separate sauté pan, two sliced onions were sautéed (in olive oil) until soft and beginning to colour.
In the original video, James had added diced lardons to the potatoes; I decided that it would suit my needs better to sauté it (guanciale, rather than pancetta, because that is what I have) with the pork medallions.
In a roasting dish, olive oil was drizzled over the bottom of the dish, and a few generous sprigs of thyme added; the onions were scooped from the sauté pan, and layered over the thyme; next, the parboiled potatoes were added, (slotted spoon the means of transport), seasoned (sea salt and black pepper) and drizzled (generously) with olive oil; that lot were then - not quite shoved - but placed in a preheated oven, around 180C, which was progressively lowered (down to under 150C) over the course of the following hour and a quarter/half.
The potatoes were absolutely delicious, though I say so, myself.
Next, according to the Hairy Bikers, was the preparation of the apples; peeled, attempts at coring, - I ended up chopping them roughly, in large pieces. The Hairy Bikers were not bothered as to the variety of apple; I used cooking apples, because that is all I have, and I love their tart flavour.
They went into the onion sauté pan, to which I added a little olive oil, a lot of French salted butter, and a generous quantity (as per the video) of organic brown sugar.
This was a revelation: Normally, I would roast apples (and that is also very successful), but this - the pan ended up playing host to an astonishing liquid that was almost toffee-like. (And hot, yes; I did remember that sugar can become incredibly hot).
The apples (and their incredible sauce) were removed to a separate dish, and the pan readied for further action.
Once again, olive oil, and butter (butter, in generous quantities); then an onion, one that had been sliced, was added, and allowed soften; next in, some diced guanciale, which was also allowed soften, then, the minced garlic (six fat cloves, even I - and I am a garlic lover - felt that the dish really didn't need any more than that) was added to the pan.
When they had all softened down, the sliced pork fillet (tenderloin) was added (which had been out of the fridge, to allow it to reach room temperature, for the previous hour or so); before it went into the pan, I had sliced it into thick medallions.
I didn't season the pork medallions, but followed the principles that I follow for fillet of steak - (and the Hairy Bikers on their video had stressed that "you don't want pork fillet cooking too long and getting tough"; I agree), - which I like rare - and cooked it very briefly on both sides, (testing and tasting).
The pork was then removed from the pan, placed in a small dish, and allowed to rest, while I got on with the sauce.
Wine (a few generous glugs) was added, reduced, the alcohol boiled off, whereupon a few ladles of potato stock were next added, and reduced, as were a few sprigs of thyme.
Following that, a few tablespoons of crème fraîche and double cream were both also added, and stirred, the heat on the pan lowered, and reduced. The apples (and their amazing toffee sauce), were returned to the pan, as were the pork fillet medallions.
Fresh herbs were advised (I didn't have any; it is winter, the farmers' market is rather bare this time of year - though I shall hunt out fresh herbs tomorrow when I pay it a fleeting visit), but dinner was absolutely delicious.
I will certainly treat myself to that particular recipe again.