Flamiche

Name: Flamiche
Prep time: 15 min
Cook time: 27 min
Total time: 42 min
Yield: 4 servings
Cuisine: France
Ingredients: 75g Butter; 1kg Leek; ½ tsp Salt; 300ml Creme Fraiche; 1 Egg; 3 Egg Yolks; ¼ teaspoon Nutmeg; 225g Plain Flour; ½ tsp Salt; 60g Butter; 60g Lard; 50g Cheddar Cheese; 2 tbs Water

By The Spice & Simmer Kitchen · Published May 3, 2026

A one-pot Vegetarian recipe with France flavors, built for busy weeknights when you want real food without a sink full of dishes. Comes together in roughly 46 minutes, serves about 4, and uses ingredients you can find at any normal grocery store. The technique is simple: build a base in your pot, layer in the main ingredients, simmer until everything has had time to talk to each other, and serve straight from the pan. If you're cooking for picky eaters, this one tends to land — the flavors are recognizable, the texture is comforting, and there's nothing weird hiding in the ingredient list. Perfect for the kind of evening where you want dinner on the table by 7pm and the kitchen empty by 7:30.

Ingredients

Makes 4 servings · 42 min total

75g Butter
1kg Leek
½ tsp Salt
300ml Creme Fraiche
1 Egg
3 Egg Yolks
¼ teaspoon Nutmeg
225g Plain Flour
½ tsp Salt
60g Butter
60g Lard
50g Cheddar Cheese
2 tbs Water

Step-by-step instructions

For the pastry, sift the flour and salt into the bowl of a food processor, add the butter and lard, then whizz together briefly until the mixture looks like fine breadcrumbs. Tip the mixture into a bowl, then stir in the cheese and enough of the water for the mixture to come together. Tip out onto a lightly floured surface and knead briefly until smooth. Roll out thinly and line a 23cm x 4cm loose-?bottomed fluted flan tin. Prick the base with a fork. Chill for 20 minutes.
Melt the 75g butter in a saucepan over a low heat, then add the leeks and the salt. Cover and cook for ?10 minutes until soft. Uncover the pan, increase the heat and cook ?for 2 minutes, stirring occasionally, until the liquid has evaporated. Spoon onto a plate and leave to cool.
Preheat the oven to 200°C/fan180°C/gas 6. Line the pastry case with baking paper and baking beans or rice and blind bake for 15-20 minutes until the edges are biscuit-coloured. Remove the paper and beans/rice and return the case to the oven for 7-10 minutes until the base is crisp and lightly golden. Remove and set aside. Reduce the oven temperature to 190°C/fan170°C/gas 5.
Put the crème fraîche into a bowl with the whole egg, egg yolks and nutmeg. Lightly beat together, then season. Stir in the leeks. Spoon ?the mixture into the tart case and bake for 35-40 minutes until set ?and lightly golden. Remove from ?the oven and leave for 10 minutes. Take out of the tin and serve.

Why this works on a weeknight

Flamiche lands at about 42 minutes total — a little longer than our 30-minute target, but most of that time is hands-off simmering, which is why it earned a spot in our Sheet-Pan Dinners collection. The technique is forgiving, the ingredient list is grocery-store standard, and the active cooking time is short enough that you can answer a text message in the middle without ruining dinner.

Cleanup notes

This is a single-pan recipe, so the cleanup is exactly one pan, one cutting board, and one knife. While the dish rests, fill the pan with hot soapy water — by the time you are done eating, the residue lifts off with a single pass of a sponge. Skip the steel wool on cast iron; a stiff brush and warm water are all you need to keep the seasoning intact.

Make-ahead and leftovers

Leftovers keep covered in the fridge for up to three days. Reheat in a dry pan over medium-low with a splash of water or stock to loosen the sauce. Flamiche actually improves overnight as the flavors keep talking to each other, so doubling the recipe and packing tomorrow's lunch is a high-leverage weeknight move.

Filed under 🍳 Sheet-Pan Dinners Vegetarian France Tart