French Mini Quiches with Herbed Egg Custard & Seasonal Vegetables

How to Make It

1. 1

   Make the Whole-Grain Pastry Dough

   In a large mixing bowl, combine the whole-wheat pastry flour and a pinch of sea salt. Add the cold cubed butter and use your fingertips to rub it into the flour until the mixture resembles coarse breadcrumbs — work quickly so the butter stays cold. Drizzle in the ice-cold water one tablespoon at a time, mixing gently with a fork until the dough just comes together. Do not overwork it. Form the dough into a disc, wrap it in cling film, and refrigerate for at least 15 minutes.

   Tip: Cold butter is the secret to a flaky, light crust. If your kitchen is warm, chill the bowl in the fridge beforehand.
2. 2

   Preheat Oven & Prepare the Muffin Tin

   Preheat your oven to 190°C (375°F / Gas Mark 5). Lightly grease a 12-cup mini muffin tin with a small amount of olive oil or non-stick cooking spray. This ensures the pastry releases cleanly after baking.

   Tip: A silicone mini muffin mould eliminates the need for greasing entirely and makes removal effortless.
3. 3

   Line the Pastry Shells

   Remove the chilled dough from the fridge. On a lightly floured surface, roll the dough out to approximately 3mm thickness. Using a round cutter (approximately 8cm diameter), cut out 12 circles. Gently press each circle into the muffin tin cavities, forming small cups that come up the sides. Prick the bases with a fork (blind-baking technique) and place the tin in the fridge for 5 minutes to firm up.

   Tip: Chilling the lined shells before baking prevents them from shrinking in the oven.
4. 4

   Blind Bake the Pastry Shells

   Place the tin in the preheated oven and bake the empty shells for 8–10 minutes until they are just set and barely golden at the edges. Remove from the oven and brush the base of each shell lightly with Dijon mustard. This classic French technique adds a subtle depth of flavour and creates a moisture barrier that keeps the pastry crisp once filled.

   Tip: Do not let the shells colour too deeply at this stage — they will continue to cook with the filling inside.
5. 5

   Sauté the Vegetables

   While the shells are baking, heat the olive oil in a non-stick skillet over medium heat. Add the diced onion and red bell pepper and sauté for 3–4 minutes until softened. Add the minced garlic and fresh thyme and cook for a further 30 seconds. Stir in the baby spinach and cook until just wilted, about 1 minute. Season lightly with black pepper and remove from heat. Allow the vegetables to cool slightly before using.

   Tip: Removing excess moisture from the vegetables prevents the custard from becoming watery. If your vegetables release a lot of liquid, pat them gently with a clean paper towel.
6. 6

   Prepare the Herbed Egg Custard

   In a medium bowl, whisk together the 4 whole eggs, 2 egg whites, and low-fat milk until smooth and well combined. Add the freshly grated nutmeg and a good grind of black pepper. Stir in half of the grated Gruyère cheese. The addition of extra egg whites increases the protein content of the custard while keeping the fat content in check — a smart clinical nutrition adjustment that does not compromise texture.

   Tip: Whisk the custard well to incorporate air — this gives the filling a light, fluffy texture once baked.
7. 7

   Fill & Bake the Mini Quiches

   Divide the sautéed vegetables evenly among the pre-baked pastry shells, placing a cherry tomato half on top of each for colour and acidity. Carefully pour the egg custard mixture into each shell, filling to just below the rim. Sprinkle the remaining grated Gruyère evenly over the tops. Return the tin to the oven and bake for 12–15 minutes, or until the custard is just set — it should have a very slight wobble in the centre when you gently shake the tin.

   Tip: Do not overbake. Overcooked egg custard becomes rubbery. The residual heat will finish cooking the centres after you remove the tin from the oven.
8. 8

   Cool, Garnish & Serve

   Allow the mini quiches to cool in the tin for 5 minutes before gently easing them out with a small offset spatula or butter knife. Arrange on a serving platter and garnish with freshly chopped flat-leaf parsley. Serve warm or at room temperature, as is traditional for French-style quiches served at bistros and boulangeries across France.

   Tip: These mini quiches are excellent for meal prep — store in an airtight container in the refrigerator for up to 3 days and reheat gently in the oven at 160°C for 5 minutes to restore their texture.