Photo of a casserole with potatoes au gratin from  Ottolenghi's Flavour

Potato gratin with leeks and parsnips

Main course | Side dish
This potato gratin gets its creaminess from coconut milk. Combined with lime, this casserole gets an Asian touch.
prepare

30min

cook

85min

total

1u55min

When you think of a potato gratin, you probably think of lots of cream and cheese. Many vegetable recipes for potato gratins contain plant-based cream and a vegan cheese substitute. Personally, I don't like most types of vegan cheese at all. I also rarely use vegetable cream. This plant-based potato gratin gets its creaminess by using coconut milk. Combined with the lime, the dish gets an Asian touch.

The basis for this recipe can be found in Flavour by Ottolenghi. This recipe is a simplified version, but I added parsnips and leeks for some extra vegetables. The result is a casserole that is delicious during winter, which still has some freshness due to the lime. Eat it as is, serve it with other dishes such as pumpkin puree or pair with a salad.

This recipe is not much work and not difficult, but it does require some planning. Put a can coconut milk in the refrigerator the night before or in the morning so that the liquid and fat can separate. This will make the coconut cream float on top. Furthermore, count on starting 2 hours before you want to eat, because it needs almost 1.5 hours in the oven. Once it's in the oven you hardly need to do anything else.

Tips

  • Using a food processor, slice the potatoes and parsnips into thin slices very easily
  • It may seem a bit cumbersome to put the coconut milk in the refrigerator first, mixing the cream layer through the potatoes, and then topping the casserole with the rest of the milk. Yet this does work best. I tried adding the coconut milk all at once, but this still became less tasty. Perfectly edible, but less tasty.
  • For a lighter version, you can also choose to add just the coconut cream and top it with 300 ml bouillon. You can use the remaining coconut milk in a smoothie
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ingredients

for 4 people

  • 1 can
    coconut milk put in the refrigerator one day before
  • 2 tbsp
    olive oil
  • 150 g
    shallots peeled and in 3 mm slices
  • 2 cloves
    garlic pressed
  • 2
    leeks in 3 mm slices
  • 1 kg
    aardappelen schoongemaakt en in plakjes van ca. 3 mm
  • 2
    pastinaak schoongemaakt en in plakjes van ca. 3 mm
  • 2
    lime juice and zested skin  approximately 60 ml
  • 1.5tsp
    stock powder or 1/2 bouillon cube
  • pepper and salt

Preparation

step 1

Preheat the oven to 180°C. Heat oil in a large oven-proof pan. Fry the shallots and garlic along with a pinch of salt 5 minutes until the onion begins to soften. Add the leeks and sauté for another 5 minutes

step 2

Put the potatoes and parsnips in a large mixing bowl. Add the shallots and leeks and stir to combine.

step 3

Scoop out the layer of coconut cream from the can coconut milk. Mix it very gently through the potatoes, together with the lime juice and a good pinch of pepper. 

step 4

Put the mixture back into the pan. Add enough water to the remaianing coconut milk so you have 300 ml of liquid. Stir in the broth powder or half a bouillon cube. Pour this over the potato gratin

step 5

Cover the pan with aluminum foil or (oven-proof) lid and put it in the oven for 40 minutes . Remove the foil or lid and pour some extra olive oil over it. Now also sprinkle the lime zest over the potatoes and bake for another 40 minutes longer. Increase the temperature to 200°C and bake another 5 minutes so that the top layer gets extra crispy

products for this recipe
Product photo of the Magimix CS 4200 XL food processor

Food processor

Product photo of a cast iron skillet from Le Creuset

Cast iron skillet

Product photo of Flavour from Ottolenghi

Flavour - Ottolenghi

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