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Asparagus & Leek Vegan Quiche on a wooden table with asparagus spears decorating it.
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5 from 3 votes

Vegan Quiche with Asparagus

This vegan quiche recipe is gluten free and can be totally nut-free if you swap the cashews for sunflower seeds! Filled with asparagus, leek and mushrooms, it's the perfect springtime dinner!
Prep Time1 hour 10 minutes
Cook Time47 minutes
Total Time1 hour 57 minutes
Course: Main Course
Cuisine: british, gluten-free, healthy, vegan
Diet: Gluten Free, Vegan, Vegetarian
Servings: 4 people
Author: Elizabeth Emery

Equipment

  • High speed blender
  • quiche pan
  • small frying pan
  • parchment paper

Ingredients

For the Crust

  • cups oats
  • ½ teaspoon sea salt
  • 3 tablespoon arrowroot powder
  • cup coconut oil, chilled (you can use vegan butter if it's easier to find where you are)
  • ¼ cup water, chilled

For the cream filling

  • cup cashews
  • ¼ cup sunflower seeds (feel free to use all cashews if you prefer, I just like to make the recipe a little cheaper by using some sunflower seeds)
  • 3 tablespoon nutritional yeast
  • 2 tablespoon chickpea flour
  • 2 teaspoon apple cider vinegar
  • ½ teaspoon sea salt
  • cup boiling water

For the vegetables

  • 16 asparagus spears (cut about ¼ of these spears into 1-inch pieces, and set the rest aside)
  • ½ small leek, sliced thinly
  • 4 small crimini or chestnut mushrooms, chopped into small pieces
  • 1 clove garlic, crushed

Instructions

To make crust

  • Preheat oven to 350F/175°C. Chill a large mixing bowl in the fridge.
  • Line the bottom of a 9-inch quiche pan with parchment paper. Use a little coconut oil to grease sides.
  • In a high speed blender, blend the oats on high until they form a smooth flour (about 30 seconds). Blend until flour is as fine as possible.
  • To your large mixing bowl, add oat flour, sea salt and arrowroot. Mix with a metal spoon to combine ingredients.
  • Remove hardened coconut oil from fridge and using hands, quickly rub it into flour mixture until it resembles fine breadcrumbs (we're doing this quickly so that the oil melts as little as possible).
  • Add water to the bowl and mix in well using a metal spoon. Use hands to quickly shape mixture into a ball of dough.
  • Place a sheet of parchment paper on a flat surface, and place dough on top. Place another sheet of parchment paper over it.
  • Using a rolling pin, roll dough out until it is about an inch wider than your pie dish on all sides and roughly 6mm thick.
  • Remove top layer of parchment paper and place quiche pan upside down on top of pastry. Gently but quickly flip over so pastry is on top of the pan! (Be careful during this part, as it can be crumbly. If pastry breaks, don't worry - it should be fixable in the next step!)
  • Remove remaining layer of parchment paper, and very gently press pastry into pie dish, ensuring it reaches the corners. If you get any cracks, use a piece of excess pastry from the edge to fill it.
  • Using a flat knife, cut the edge of the pastry around the rim of the dish so you have a nice clean crust. (You will likely end up with a little to spare - feel free to use this as you wish!)
  • Bake crust in oven for 20 minutes, until it feels solid and crust is starting to come away from the pan (but before it turns golden).
  • Remove and allow it to cool in its pie dish for 10 minutes.

To make filling

  • While the crust is still baking, add all cream filling ingredients to high speed blender and blend until totally smooth. Set aside.
  • Add the chopped asparagus spears (reserve whole ones for later), mushrooms and leek to a small frying pan with a tablespoon of water and cook for 5 minutes until vegetables are tender, stirring constantly (the water will act like oil and stop the vegetables sticking).
  • Add garlic and cook for a further 2 minutes. Remove from heat.

To assemble

  • Spread cashew cream filling evenly over quiche crust.
  • Pour cooked vegetables on top, and gently stir into cream until they're mostly covered.
  • Layer remaining asparagus spears over top of quiche, trimming as needed to fit pan (you can poke trimmed offcuts into quiche filling to cook).
  • Bake in oven for 20 minutes, until asparagus spears look cooked and crust is starting to brown.
  • Remove and allow to rest in quiche pan for 5-10 minutes before slicing and serving.