- Heat the olive oil in a large frying pan over a medium heat.
- Add the shallots with a pinch of salt and cook for 2–3 minutes until beginning to soften.
- Add the mushrooms and cook for 6–8 minutes until they release their moisture and start to colour.
- Stir through the garlic and thyme and cook for a further 2 minutes.
- Add the Merchant Gourmet Simply Cooked Beluga Lentils.
- Stir in the flour and cook for 1–2 minutes.
- Gradually pour in the vegetable stock, followed by the oat cream and parsley.
- Bring to the boil, then reduce to a simmer and cook for a few minutes until thick and creamy.
- Add the spinach and cook until wilted.
- Season well with salt and black pepper.
- Transfer the mixture to a medium ovenproof dish.
- Preheat the oven to 200°C / 180°C fan / Gas Mark 6.
- Arrange the potato slices in overlapping layers across the top of the filling until completely covered.
- Season with salt and black pepper and scatter over a little extra thyme.
- Bake for 25–30 minutes until the potatoes are golden and the filling is bubbling.
- Leave to stand for a few minutes before serving.
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