Charred Spring Onion & Gruyère Rough-Puff Galette

Instructions

1. 1

   Smash the 170g Cultured butter into the 250g All-purpose flour and 1 tsp Kosher salt with your fingers until the pieces are flat like coins. This is your quick-flake insurance; large, flat shards of butter create steam pockets later. Combine the 60ml Ice water and 1 tbsp Apple cider vinegar, drizzle over the flour mixture, and toss lightly to form a shaggy mass.

   10 min

   Tip: The acid in the vinegar inhibits gluten development, keeping the crust tender. Work quickly so the butter doesn't melt.

2. 2

   Turn the dough onto a piece of parchment paper, press it into a rough 1-inch thick disc, and wrap it tightly. Shove the dough in the freezer for a fast 20-minute chill. The fridge is your friend, but the freezer is your Friday-night savior. Meanwhile, preheat the oven to 400°F (200°C).

   20 min

   Tip: Don't over-knead. The dough should look messy and hold together just enough to form a disc.

3. 3

   While the dough chills, trim the roots off the 2 bunches Spring onions and slice them in half lengthwise. Toss them in a bowl with the 1 tbsp Olive oil and a small pinch of salt. Grate the 150g Aged Gruyère. Whisk the 1 Egg in a small bowl.

   10 min

   Tip: Avoid pre-shredded cheese; the anti-caking agents make it melt tight like a bad alibi.

4. 4

   Remove the dough from the freezer. On a lightly floured sheet of parchment, roll it out into a 14-inch rough circle. Smear 2 tbsp Dijon mustard evenly over the center, leaving a 2-inch clean border. Scatter the 150g Aged Gruyère and 1 tbsp Fresh thyme directly over the mustard.

   5 min

   Tip: If the dough cracks at the edges while rolling, just pinch it back together. Freeform means no fuss.

5. 5

   Arrange the 2 bunches Spring onions uniformly over the cheese layer. Fold the clean border of dough up and over the filling, pleating as you go. Brush the exposed pastry with the 1 Egg wash and scatter a generous pinch of 1 pinch Flaky sea salt over the edges.

   5 min

   Tip: Press the pleats down firmly so they don't unfold in the oven.

6. 6

   Slide the parchment paper directly onto a heavy baking sheet. Bake until the crust is deeply golden brown, the cheese is lacy and bubbling, and the spring onions are charred and jammy.

   35 min

   Tip: Look for a dark, confident bake. Pale pastry is tragic. Don't pull it early.

7. 7

   Remove the galette from the oven and let it sit on the pan for 10 minutes. The hot cheese needs time to set up and stabilize before you cut into it.

   10 min

   Tip: We're not suffering for Friday dinner, but we do need a clean slice. Don't skip the rest.