Leek & Mushroom Tart (Gluten-Free, Grain-Free)

This delicious leek and mushroom tart is made with a gluten-free and grain-free savoury crust, seasoned with a touch of garlic and thyme. It’s a combination between a quiche and a tart with egg-based filling. You can serve it hot or cold with a side salad or some lovely aioli or tomato salsa. Enjoy and don’t forget to rate this recipe and leave your comments and questions below. 


Gran-Free Leek & Mushroom Tart

Leek & Mushroom Tart

What I love about this grain-free and gluten-free savoury tart is that you can serve it dinner, lunch or weekend breakfast/brunch. It’s also fabulous hot or cold so you can whip it up ahead of time.

Making a tart is a great way to showcase seasonal ingredients as part of the filling. I love using pan-fried mushrooms and leeks or onions with a touch of thyme and garlic for that classic French combo but you can also add roasted vegetables, canned artichokes or sun-dried tomatoes, sauteed spinach or kale, ham or crispy bacon, feta and so on. 

The crust is made with almond meal and tapioca flour but as I wanted to keep it as a grain-free recipe but you can use all gluten-free flour instead. This recipe contains dairy in the form of butter in the crust and some grated Cheddar in the filling.

You can omit the cheese and swap butter for ghee for a low-lactose (basically dairy-free) version. On the other side of the spectrum, for extra rich filling, you can add some cream to the egg mixture. 

Savoury Tart With Leeks & Mushrooms (Gluten-Free, Grain-Free)
 

How To Make Leek & Mushrooms Tart (Video)

You will find the full list of ingredients, instructions, nutritional breakdown and step-by-step photos below in a recipe card. I’ve put together a little video of how to make this grain-free tart from start to finish. 

Savoury mushroom tart slice


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Leek & Mushroom Tart Grain-Free

Leek & Mushroom Tart (Gluten-Free, Grain-Free)

Prep Time: 20 minutes
Cook Time: 30 minutes
Total Time: 50 minutes
Author: Irena Macri
Servings: 6 slices
Course: Brunch
Cuisine: French
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5 from 5 votes
Calories: 412kcal
This leek and mushroom tart is gluten-free and grain-free and can be served for brunch, lunch, dinner with a salad or veggies or prepared as an appetizer or picnic food.

Ingredients 

For the tart crust

  • 1 cup almond meal about 100 grams
  • 1 cup tapioca flour about 100 grams
  • 1/2 cup butter 90 grams, salted
  • 1/2 teaspoon salt
  • 1/4 teaspoon pepper
  • 1 garlic clove finely diced
  • 1 teaspoon thyme leaves fresh or dried
  • 1 egg

For the filling

  • Olive oil for cooking
  • 1 leek sliced into thick circles (white and pale green parts)
  • 250 g button mushrooms 0.5 lb., sliced
  • 1/4 teaspoon salt
  • A pinch of pepper
  • 1/2 teaspoon lemon zest
  • 1 garlic clove crushed or diced
  • 1 tablespoon lemon juice
  • 5 large eggs whisked
  • Optional: 50 g / 2 oz. Cheddar cheese grated

Instructions

  • Preheat the oven to 190 C / 375 F.
  • Add all tart crust ingredients except for the egg to a food processor. Whiz until combined and the mixture starts to come together. At this stage, add the egg and process again briefly to incorporate. Scrape the sides halfway. The mixture should be easy to mould with your fingers.
  • How to make savory tart crust grain-free
  • Transfer the crust mixture to a tart tin. I use a medium round tin with a removable bottom but you can use a square one or mini ones. Place the dough mixture in the middle and mould it into a pancake. Then use your fingers to press it down and spread into the sides as evenly as possible. The dough is easily breakable but is sticky so you can mend any cracks. Once evenly spread, press your fingers into the edges making sure the dough covers the sides of the tin. They don't need to be cover the whole height of the sides, halfway is okay. Poke the base with a fork a few times.
  • How to make grain-free, gluten-free tart crust
  • Partially bake in the 190 C / 375 F oven for 12-15 minutes, until set and firm but isn't golden brown. Remove and set aside.
  • Whisk the eggs in a bowl and season with a little salt and pepper and set aside.
  • Slice the leeks into thick circles, about 1/2-cm each and move them to a plate, keep them intact. Slice the mushrooms and set aside.
  • Heat a frying pan over medium-high heat and add a little olive oil. Add the whole leek circles and cook for 2 minutes each side, until golden brown and slightly charred. Remove carefully to a plate, keeping the circles intact still.
  • Add a little more oil to the pan and follow with the mushrooms. Season with a couple of pinches of salt and a little pepper. I like to grate a little lemon zest but it's optional. Cook for 3-4 minutes, stirring a couple of times. Add once diced garlic clove and a splash of lemon juice, and cook for 2 more minutes or so. The idea is to let the mushrooms release their juices and then cook them long enough for those juice to evaporate, so we remove as much liquid as possible. You will be left with golden brown mushrooms.
  • Cooking mushrooms and leeks for the tart filling
  • Okay, it's time to build our tart. Sprinkle the bottom of the crust with 1/2 cup of grated cheese if using. Pour in the egg mixture evenly and top with the mushrooms. Spread those evenly and then place the pre-cooked leek circles on top, gently pressing them into the mixture. Add a few more sprigs of thyme and pop in the 190 C / 375 F oven for 20 minutes.
  • Once ready, remove and allow to sit for a few minutes before removing the tart from the tin. Slice and serve with a salad or/and a side of tomato salsa, relish, aioli or as is.
  • How to assemble and bake the mushroom tart
  •  

Notes

Leeks can be subbed with sauteed onions. If avoiding onions, use grilled zucchini or some sliced artichokes or sun-dried tomatoes from a jar, or simply go with all mushrooms.
I kept this vegetarian-friendly but you can add diced ham or sausage to the tart for extra protein.
If not using cheese, add an extra egg. You can use some dairy-free cheese alternatives or sprinkle some nutritional yeast for a little cheesy flavour. You can also use ghee instead of butter to avoid lactose.

Nutrition

Calories: 412kcal | Carbohydrates: 26g | Protein: 11g | Fat: 31g | Saturated Fat: 12g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 7g | Trans Fat: 1g | Cholesterol: 204mg | Sodium: 480mg | Potassium: 239mg | Fiber: 3g | Sugar: 2g | Vitamin A: 974IU | Vitamin C: 5mg | Calcium: 82mg | Iron: 2mg
Keywords: Lunch Ideas, Brunch, Grain-Free, Tart recipes, Leeks, Gluten-Free
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Leek & Mushroom Tart (Grain-Free, Gluten-Free)
Savory Tart With Leeks & Mushrooms (Gluten-Free, Grain-Free)
 
Irena Macri
By Irena Macri

About the author: Hi, I’m Irena Macri. I share delicious recipes that I have cooked and loved. I am a published cookbook author, have been food blogging for over 10 years and have a Diploma in Nutrition. You will find many healthy recipes as well as my favourite comfort food. More about me here | Subscribe to my newsletter and freebies

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Comments

13 Comments
  1. I am looking forward to trying this, but am not sure what size a “medium” tart pan is. I have a 9 inch tart pan. Is that too small?

    1. It should work, if it’s smaller, the tart will be taller and if it’s larger, it will be a little flatter.

  2. 5 stars
    Great recipe. Really easy to make and delicious. I really liked the grain free tart crust. Thank you!

    1. We had leftovers a day later and it was still fine but I haven’t kept it for more than about 24 hours so don’t know if 2 days might change the texture a bit. Store in the fridge, maybe place some paper towel (kitchen roll) sheets in the container to absorb any excess moisture.

  3. 5 stars
    This tart is outstanding! I sautéed the mushrooms and leeks together and for a bit longer for more flavor and put follow your heart dairy free parm inside. People who can eat gluten and dairy were asking for the recipe. Thank you so much!

  4. 5 stars
    Made this again yesterday and have requests to make it for a shared Morning Tea next week. I was just wondering if I could freeze it once cooked? And would I need to defrost it before reheating or just reheat from frozen.

    1. Yes, you should be able to freeze it. Divide into individual portions so it’s easier to defrost just what you need. The egg texture does change slightly when frozen but not too bad.

  5. 5 stars
    This was so incredibly delicious I wanted a second slice. I added a spring onion and some asparagus just because I needed to use them up. The pie was so juicy and tasty and your pastry was a perfect complement, and easy to make.

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