2small potatoes (about 230 g)peeled and cut into chunks
3carrots (about 200 g)sliced
1small turnipdiced
60gbutter
11 onionfinely chopped
2pressed garlic cloves
1large celery stalk (about 80 g)finely diced
1sliced leek
100gbutton mushroomsquartered
100gfrozen peas
40gflour
1pinchground nutmeg
1tablespoonfresh thyme
20clvegetable stock
5cldry white wine
1tablespoonlemon juice
15clfresh cream
1 beaten eggfor the glaze
Salt and pepper
Instructions
For the shortcrust pastry
In a bowl, combine the flour and salt.Cut the butter into small pieces and crumble it with the flour until it becomes fine and slightly grainy.Gradually pour in the cold water, mixing with a fork.
Knead the dough into a ball by hand.Wrap in plastic wrap and let rest in the refrigerator for at least 1 hour.
For the filling
In a saucepan, place the carrot, turnip, and potato pieces.Cover with water to cover the vegetables and cook over medium heat until the vegetables are tender (about 15 minutes).Drain the vegetables and set aside.
Melt the butter in a large skillet over medium heat.Add the sliced onion, garlic, celery, and leek whites and cook for 3 to 4 minutes.Add the chopped mushrooms and sauté for 1 more minute.Stir in the flour, salt, pepper, nutmeg, and thyme.Gradually pour in the vegetable broth, wine, and lemon juice, then the cream, stirring constantly until the mixture thickens. Cook for about 10 minutes.Turn off the heat and add the peas and vegetables.
Preheat the oven to 200°C.
For assembly
Divide the shortcrust pastry into two parts.Roll out the first part into a large disc and place it in a buttered and floured tart pan, or lined with parchment paper.
Sprinkle with the vegetable filling.
Roll out the second pastry disc and use it to cover the tart.Trim the excess pastry all around, then seal the edges of the first and second pastry discs by pressing with your fingers.Using a small knife, make a few slits on the top of the pastry to allow steam to escape during baking.
Brush the top of the pastry with the beaten egg and bake for 30 minutes, until golden brown.After 15 minutes, if the pastry browns too quickly, cover with aluminum foil and continue baking.Let rest for a few minutes after removing from the oven and enjoy!