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Rory's gratin of potato and mushroom

Rory O'Connell
Rory O'Connell

A comforting side dish that goes brilliantly with lamb chops or steak.

Ingredients

  • 1kg old potatoes
  • 225g flat mushrooms
  • butter
  • 1 clove garlic, finely chopped
  • salt and freshly ground pepper
  • 200ml cream
  • 100ml milk
  • 3 tablespoons mixture of grated Parmesan AND Irish mature Cheddar cheese
  • Long aluminium containers

Method

  1. Slice the mushrooms. Peel the potatoes and slice thinly into 5mm (1/4 inch) slices.
  2. Bring a large saucepan of water to the boil. Add the potato slices to the boiling water.
  3. As soon as the water returns to the boil, drain the potatoes. Refresh under cold water. Drain again and arrange on kitchen paper or a clean tea towel.
  4. Grease a shallow gratin dish generously with butter and sprinkle the garlic over it.
  5. Arrange half the potatoes in the bottom of the dish, season with salt and freshly ground pepper. Cover with the sliced mushrooms. Season again and finish off with a final layer of overlapping potatoes.
  6. Bring the cream almost to boiling point and pour over the potatoes. Sprinkle the cheese on top and bake for one hour approx. at 180°C/350°F/Gas Mark 4, until the gratin becomes crisp and golden brown with the cream bubbling up around the edges.
  7. This gratin is terrifically good with a pan-grilled lamb chop or a piece of steak.