Mornay onion tart


Mornay onion tart
In a shortcrust pastry base, a rather thick onion tart, where onions and lardons are deliciously bound with a Mornay sauce.
6,905 5.0/5 (27 reviews)
Grade this recipe:
Keywords:
Last modified on: June 23th 2024
For 6 people, you will need:

Change to the quantities for:
Times for this recipe
Preparation: 1 hour 3 min.
Cooking: 1 hour 15 min.
All in all: 2 hours 15 min.
When should you start or finish this recipe?
If you start now, at , you will finish around : ?.Change start time
To finish around 7pm, you'll need to have started before: .Change end time

Step by step recipe


Stage 1 - 20 min.
Mornay onion tart
Roll out 300 g Shortcrust pastry (pâte brisée) then line a 22 cm (9-inch) diameter high-sided baking tin, which you will have placed on a sheet of baking paper in a baking tray.

Leave any excess dough around the edges, then place in the fridge to set aside.

Stage 2 - 10 min.
Mornay onion tart
Prepare and slice 1 kg onion (a mandolin is ideal for this).
This may seem like a lot, but don't worry, they'll reduce when cooked.

Stage 3 - 3 min.
Mornay onion tart
In a large saucepan over medium heat, melt 50 g butter, and when hot, add the onions.

Season with salt and stir well.

Cover for the first 5 minutes.

Stage 4 - 10 min.
Mornay onion tart
Leave to cook until the onions are tender, checking the salt seasoning as cooked onions tend to be a little sweet.

Stage 5 - 5 min.
Mornay onion tart
Your onions should be fairly dry, with little or no cooking juices.
If this isn't the case, because they've given off a lot of water during cooking, drain them in a fine sieve.

Set aside.

Stage 6 - 3 min.
Mornay onion tart
Preheat oven to 200°C (390°F).

Cut 150 g smoked pork belly (or thick cut streaky bacon) into small pieces.

Stage 7 - 8 min.
Mornay onion tart
Toast them, without adding fat, in a small frying pan over medium heat.

Stage 8 - 1 min.
Mornay onion tart
When toasted to your liking, add 4 tablespoons vinegar, and stir until evaporated.

Stage 9 - 2 min.
Mornay onion tart
It's not essential, but I recommend adding 2 or 3 spoonfuls of already-cooked onions to the pan at the end of cooking, then stirring well to capture all the flavor of the grilled bacon.

Stage 10 - 2 min.
Mornay onion tart
Pour the lardons + onions into the remaining onions and mix well.

Stage 11 - 2 min.
Mornay onion tart
Add 300 g Mornay Sauce and mix well.

Stage 12 - 20 min.
Mornay onion tart
Take the pastry mould out of the fridge, cut the excess pastry around the edges of the mould, place a sheet of baking paper on the bottom and fill with ceramic balls (or similar).

Bake at 200°C (390°F) for 20 minutes.

Stage 13 - 5 min.
Mornay onion tart
In the meantime, you can roll out the pastry scraps into small strips to decorate the tart.

Stage 14 - 1 min.
Mornay onion tart
After 20 minutes, remove the baking tray from the oven...

Stage 15 - 5 min.
Mornay onion tart
... and remove paper and beads.

Stage 16 - 2 min.
Mornay onion tart
Fill the tart with the onion-lardon-Mornay mixture.

Stage 17 - 2 min.
Mornay onion tart
If you have made some, place the pastry strips on top.

Stage 18 - 3 min.
Mornay onion tart
Sprinkle with a little grated cheese.

Stage 19 - 30 min.
Mornay onion tart
Bake for a further 30 minutes.

Stage 20
Mornay onion tart
Enjoy warm or hot, on its own or with a small green salad.
Remarks
If you find your onions a little too soft at the end of cooking, you can add a good glass of dry white wine.

If you don't have a Mornay sauce, use a Béchamel sauce to which you can add grated cheese to taste.

You'll notice that in this recipe, the onions are cooked without coloring, but if you prefer, you can caramelize them. In this case, increase the weight of onions to 1.5 kg, as they will reduce even more.
Keeping: 1 or 2 days in the fridge, protected by cling film.
Source: Home made.
Nutritional information
Proteins (gr)Carbohydrates (gr)Fats (gr)Energy value (in k-calories)Energy value (in k-joules)
Whole recipe360 RDI=140 %1,490 RDI=140 %1,280 RDI=200 %3,420 RDI=170 %14,320 RDI: 170 %
Per 100 g20 RDI=7 %80 RDI=7 %70 RDI=10 %180 RDI=9 %760 RDI: 9 %
Per person60 RDI=20 %250 RDI=20 %210 RDI=30 %570 RDI=30 %2,390 RDI: 30 %
The % figures are calculated in relation to the Recommended Dietary Intake , or RDI of 2,000 k-calories (or 8,400 k-joules) per day for a woman Change to a man
Possible allergens in this recipe: Gluten, Milk, Egg, Sulfites
How much will it cost?
  • For 6 people : 5.40 €
  • Per person : 0.90 €

Change currency:

Note: Be careful, these prices are only an estimate, you can consult the table of prices by ingredients used for this estimate.
This recipe uses (among others)
Shortcrust pastry (pâte brisée)
Shortcrust pastry (pâte brisée)

You can get more informations, or check-out other recipes which use it, for example: Potato and cheese pie, Leek and Mimolette tart, Mexican tart, Quiche Lorraine, Salmon and spinach quiche, ... See them all 15

Mornay Sauce
Mornay Sauce

You can get more informations, or check-out other recipes which use it, for example: Small green vegetables in Mornay sauce, Manou's zucchinis garnished, Spinach Mornay, ... See them all 3

Smoked pork belly (or thick cut streaky bacon)
Smoked pork belly (or thick cut streaky bacon)

Like these other recipes: Boeuf (beef) bourguignon, Soup Cornouaillaise, Warm lentil salad, Express sauerkraut, ... See them all 4

Other recipes you may also like
Chestnut cake
Chestnut cake
This delightful cake is doubly chestnutty: it contains chestnut flour, and sweet chestnut purée.
May 8th 2020330 K5 1 hour 15 min.
Fruit crumble
Fruit crumble
A fruit pudding: very easy to do and delicious: just a layer of fruit with a golden crunchy topping.
February 21th 2011352 K4.0 1 hour 15 min.
Epiphany galette
Epiphany galette
Here is the recipe for the very classic but delicious "galette des rois" (Epiphany galette) in puff or flaky pastry (pâte feuilletée) with almond cream or frangipane . You will also see some professional tips to easily handle the dough, and obtain a nice and regular galette.
January 6th 2021282 K 24.5 3 hours 8 min.
Caramelised apple pie
Caramelised apple pie
Apple pie made with caramelised apples.
September 11th 2018254 K4.3 1 hour 55 min.
Toasted almond cake
Toasted almond cake
A layer cake, with toasted almonds in the chocolate part.
July 5th 2016237 K4.4 2 hours 2 min.
News list of cooking-ez.com

Sign up to receive the latest recipes (next batch due to be sent on 2024-11-17)

*Your e-mail Your first name or nickname
I am not a leaving thing
Note: We'll never share your e-mail address with anyone else.
Post a comment or question
Posted by:
I am not a leaving thing
Follow this recipe
If you are interested in this recipe, you can "follow" it, by entering your email address here. You will then receive a notification immediately each time the recipe is modified or a new comment is added. Please note that you will need to confirm this following.
I am not a leaving thing
Note: We'll never share your e-mail address with anyone else.
Alternatively: you can subscribe to the mailing list of cooling-ez.com , you will receive a e-mail for each new recipe published on the site.

Back to top of page