Enjoy the rich, savory taste of a traditional French bakery with this Low-GI Classic French Leek Quiche! Featuring tender, slow-cooked leeks layered with nutty Gruyère cheese and a velvety egg custard, all baked inside a homemade oat bran crust. It’s a lightened, blood-sugar-friendly spin on northern France’s classic flamiche that brings elegant French comfort to your table without spiking your glucose.
Glycemic Index Profile
| Ingredient | Glycemic Index (GI) | Glycemic Impact / Role |
| Ground Oat Bran | Low (35-50) | Soluble fiber-rich crust alternative that drastically reduces glycemic load compared to white flour. |
| Leeks | Low (15) | Non-starchy, fiber-dense allium providing antioxidants and prebiotic gut support. |
| Eggs & Gruyère Cheese | Zero (0) | High-quality protein and healthy fats that stabilize postprandial blood sugar. |
| Extra Virgin Olive Oil | Zero (0) | Heart-healthy unsaturated fats that slow gastric emptying and enhance satiety. |
Synergistic Effect
Combining high-fiber oat bran with protein-rich eggs, Gruyère cheese, and olive oil creates a balanced digestive matrix. The combination slows carbohydrate breakdown, keeping energy levels steady and preventing postprandial glucose spikes.
Low-GI Classic French Leek Quiche
Description
Savor this Low-GI Classic French Leek Quiche! Tender leeks, savory Gruyère, and egg custard baked in a fiber-rich oat bran crust. Formulated for insulin resistance, PCOS, and low-glycemic eating.
Ingredients
QUICHE:
PIE CRUST:
Instructions
-
Make the pie crust: In a large bowl or in the bowl of a standing mixer fitted with the paddle or a food processor fitted with the steel blade, combine the oat bran flour and salt and mix together. (We reserved 100 grams of the oat bran to add gradually after adding the olive oil so we could achieve the correct dough consistency and not be too dry.) If using a bowl, make a well in the center, add the olive oil and mix in with a fork. If using a mixer or food processor, turn on and add the olive oil. When it is evenly distributed through the flour combine the water and vinegar (or lemon juice) and add it to the flour mixture with the machine running. The dough should come together in a ball (or get thick enough to be formed into a ball).
-
Turn out the dough onto a lightly floured work surface, flour your hands and work the dough just until smooth and easy to shape into a ball.
-
Roll out the dough until it’s large enough to cover the bottom of your tart pan.
-
Place the tart pan upside down on the rolled out dough and press downward (as though cutting out a cookie with a cookie cutter.) Pull the dough away from the edges of the inverted tart pan and then slide the tart pan off the counter and onto a large plate.
-
Invert the plate and tart pan, remove the plate, and press down on the dough inside the tart pan. Set aside.
-
Cut away the root and dark green leaves from the leeks and cut in half lengthwise. Run under cold water to remove sand. If the leeks are very sandy and soak them for 15 minutes or so, then run under cold water again. Drain on paper towels. If the leeks are very fat, cut the halves in half again lengthwise, then cut in thin slices.
-
Preheat the oven to 350 degrees F / 176 C. Heat the oil over medium heat in a lidded skillet or saucepan and add the leeks and a pinch of salt. Cook gently, stirring, until they begin to soften. Turn the heat to medium-low, cover and cook gently until the leeks are very soft but not browned, stirring often, 10 to 15 minutes. If they begin to stick or brown, add a little more salt and/or a spoonful of water or wine. Stir in the garlic if using and cook for another 30 seconds to a minute, until fragrant.
-
Beat together the eggs in a medium bowl. Set the tart pan on a baking sheet to allow for easy handling. Using a pastry brush, lightly brush the bottom of the crust with the egg mixture - just enough to cover it, reserving the rest of the eggs for the custard. Place the crust in the oven for 10 minutes. Remove from the oven and set aside.
-
Add ½ teaspoon of salt, pepper to taste and milk to the reserved eggs and whisk together.
-
Spread the leeks in an even layer in the crust.
-
Sprinkle the cheese in an even layer on top.
-
Pour in the custard filling. Place in the oven and bake for 30 minutes, or until set and just beginning to color on the top.
-
Remove from the oven and allow to sit for at least 15 minutes before serving.
Nutrition Facts
Servings 4
- Amount Per Serving
- Calories 333kcal
- % Daily Value *
- Total Fat 24g37%
- Saturated Fat 7g35%
- Cholesterol 123mg41%
- Sodium 687mg29%
- Potassium 311mg9%
- Total Carbohydrate 18g6%
- Dietary Fiber 3g12%
- Sugars 5g
- Protein 12g24%
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.
Note
- You are discarding the part of the crust that does not fit into the tart pan. For that reason, we’ve decreased the macronutrients for the crust by 20%. You can also save the excess crust and use it for a smaller tart.
- The oat bran dough is quite crumbly, so use your rolling pin carefully, assuring there is enough unbroken crust to cover the bottom of the tart pan.
- French Culinary Heritage: A lightened, metabolic-friendly variation of flamiche, a traditional French leek tart typically made with heavy butter and cream or crème fraîche.
low gi leek quiche, oat bran pie crust quiche, insulin resistance leek tart, pcos friendly breakfast quiche, healthy french flamiche, low glycemic savory quiche
