Preheat the oven to 200C/400F/Gas 6.
Heat the whisky, honey, lemon juice and water into a saucepan and heat until the honey dissolves.
Stir in the mustard seeds and cook for 1-2 minutes, or until most of the liquid has been absorbed.
Blend the mixture in a food processor until creamy (this will take a few minutes).
Sprinkle the breadcrumbs onto a plate.
Brush the pork chop on one side with the mustard mixture and dredge in the breadcrumbs. Spoon the remaining mustard into a small bowl and set aside.
Heat the olive oil and butter in an ovenproof frying pan until hot. Fry the pork chops for 2-3 minutes on each side, or until golden-brown on each side.
Transfer to the oven for 6-8 minutes, or until the pork is cooked through. Remove from the oven and set aside to rest.
For the sautéed potatoes, heat the olive oil and half of the butter in a frying pan until hot. Fry the potatoes for 4-5 minutes, or until golden-brown and tender. Add the garlic and rosemary and season, to taste, with salt and freshly ground black pepper.
Heat the remaining butter in a frying pan, add the spinach and water and cook for 2-3 minutes, or until the spinach has wilted.
To serve, spoon some potatoes onto each of 4 serving plates, top with a pork chop and spoon some spinach alongside. Serve with the remaining mustard.
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