Mushroom & Potato Gratin [vegetarian] by The Flexitarian

Mushroom & Potato Gratin [vegetarian]

Published on October 11, 2017 | In , | By
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Bubbling with cheese and cream, this Mushroom & Potato Gratin is the ultimate comfort food. Potato gratin is a classic in French cuisine and here I have added some mushrooms for an autumnal twist as well as warming hints of rosemary and nutmeg.

You can enjoy this dish on its own served with a crunchy salad or as a side dish.

I used Albert Bartlett Rooster Potatoes to make this recipe. They are perfect for potato gratin as they hold their shape while baking.

Rooster Potatoes have a unique deep red skin and a delicious nutty taste. Versatile you can roast, boil, steam, mash and bake them. No wonder they are dubbed as Britain’s favourite branded potato.

Mushroom & Potato Gratin Packaging

Albert Bartlett Rooster Potatoes have just come into season so it is the perfect time to enjoy them. They are available from Asda, Sainsbury’s, Waitrose, Ocado and Morrisons.

You can find out more about them here.

Mushroom & Potato Gratin [vegetarian] by The Flexitarian

This recipe was commissioned by Albert Bartlett.

Mushroom & Potato Gratin [vegetarian] by The Flexitarian
Mushroom & Potato Gratin [vegetarian] by The Flexitarian
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Ingredients

  • 900g Albert Bartlett's Rooster Potatoes or other baking potatoes [2 lbs]
  • 500g chestnut mushrooms [1.1 lbs]
  • 100g shallots [3.5 oz]
  • 2 garlic cloves
  • 1 heaped Tbsp freshly chopped rosemary leaves + 1 sprig
  • 40g butter [1.4 oz] + extra for greasing gratin dish
  • 60ml white wine [2 fl oz / US 1/4 cup]
  • 300ml double cream [10.5 fl oz / US 1 1/4 cup]
  • 100ml milk [3.5 fl oz / US 1/2 cup]
  • 150g grated cheddar [5.3 oz]
  • nutmeg to taste
  • salt & pepper

Instructions

  1. Clean mushrooms and cut them into 2.5mm [0.1 inch] thin slices. Put the cream, 1 crushed garlic clove, rosemary sprig and milk into a small saucepan. Slowly bring to just below boiling. Turn off the heat, season and leave on the side to infuse. Pre-heat the oven to 180°C/350°F/Gas 4.
  2. Heat the butter in a large frying pan. Add finely chopped shallots. Fry gently for a few minutes until soft.

    Mushroom & Potato Gratin Step 1

  3. Add sliced mushrooms, white wine and finely chopped rosemary.

    Mushroom & Potato Gratin Step 2

  4. Cook covered under medium heat for 5 minutes. Carry on cooking uncovered for around 8 minutes until mushrooms are done. Season to taste.
  5. In the meantime cut the potatoes in 2.5mm [0.1 inch] slices. Put on a clean cloth and pat dry.

    Mushroom & Potato Gratin Step 3

    Mushroom & Potato Gratin Step 4

  6. Grease gratin dish generously with butter. Rub second garlic clove all over the gratin dish.
  7. Layer half of potatoes at the bottom of the gratin dish. Season with salt, pepper and nutmeg.

    Mushroom & Potato Gratin Step 5

  8. Add mushrooms and their juices (if any) on top.

    Mushroom & Potato Gratin Step 6

  9. Spread 5 Tbsp of the cream and milk mixture on top of mushrooms.

    Mushroom & Potato Gratin Step 7

  10. Layer the second half of the potatoes on top of the mushrooms. Season with salt, pepper and nutmeg.

    Mushroom & Potato Gratin Step 8

  11. Add the rest of the cream and milk mixture (rosemary sprig removed) on top. Sprinkle with grated cheese all over.

    Mushroom & Potato Gratin Step 9

  12. Cook in the oven for 45 - 60 mins until the potatoes are cooked and gratin is golden.

    Mushroom & Potato Gratin [vegetarian] by The Flexitarian

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