Luxembourgish Mustard Tart

The Luxembourgish Mustard Tart, known locally as "Gromperekichelcher Mat Moschter", is a savory pastry that beautifully showcases the rich culinary heritage of Luxembourg. This delectable tart is a staple in Luxembourgian kitchens and is often enjoyed as a main dish or an appetizing side. The origins of this recipe date back to the 19th century when mustard started gaining popularity in the region due to the influence of neighboring countries like France and Germany. It is a delightful blend of rich, savory flavors that have been passed down through generations.

Ingredients

• Flour
• Butter
• Water
• Salt
• Mustard
• Heavy Cream
• Eggs
• Onion
• Gruyere Cheese
• Black Pepper

Instructions

Preparation

1. Preheat your oven to 180°C (356°F) to ensure it reaches the desired temperature while you prepare the ingredients. You can use this cooking timer to keep track.

2. For the tart crust, combine flour and a pinch of salt in a mixing bowl. Cut in small cubes of butter until the mixture resembles coarse crumbs.

3. Add water gradually and mix until the dough comes together. Be careful not to overwork it. Wrap the dough in plastic wrap and refrigerate for at least 30 minutes.

4. While the dough is chilling, slice the onion and grate the gruyere cheese. Set them aside.

Making the Filling

1. In a medium bowl, whisk together heavy cream, 2 eggs, and a pinch of black pepper.

2. Stir in the sliced onion and grated gruyere cheese into the mixture. Add 3 tablespoons of mustard and combine until smooth.

Assembling the Tart

1. Roll out the chilled dough on a floured surface to fit your tart pan. Line the pan with the dough and trim off any excess.

2. Pour the filling into the prepared tart shell, ensuring it is evenly distributed.

3. Bake in the preheated oven for about 35-40 minutes or until the filling is set and the crust is golden brown. Use a cooking timer to prevent over-baking.

Serving the Tart

Once baked, let the tart cool for a few minutes before serving. The Luxembourgish Mustard Tart elegantly combines with a crisp green salad or a glass of chilled white wine, enhancing the savory flavor of the mustard and gruyere cheese. Enjoy a taste of Luxembourg's rich culinary tradition with each bite!

Enjoying Your Meal

This tart can be enjoyed warm or at room temperature, making it a versatile dish suitable for picnics or quick weeknight dinners. The creamy filling and the sharpness of the mustard pair perfectly with crunch from the onion and richness of the gruyere cheese. Let each slice transport you to the scenic landscapes of Luxembourg, where tradition meets taste in every bite.