Onion Tart with Mustard and Fennel

A Taste of Provence: My Simple Onion Tart

The aroma of slow-cooked onions, caramelized to a sweet perfection, fills my kitchen. It's a scent that transports me, instantly conjuring images of sun-drenched Provençal fields and bustling market squares. Today, I'm sharing a recipe that's both incredibly simple and deeply satisfying: a classic onion tart with a twist of fennel and a touch of Dijon mustard.

This tart isn't just a meal; it's a journey. Each bite is a testament to the beauty of simple ingredients, elevated by careful preparation and a touch of culinary magic. The sweet, almost marmalade-like onions are the stars of the show, perfectly balanced by the subtle anise notes of the fennel seeds and the sharp tang of the Dijon. The light and airy yeast crust complements the richness of the filling, creating a harmony of flavors and textures that's truly unforgettable. I've always loved the versatility of a good tart; it's just as perfect for a casual weeknight dinner as it is for a more elegant gathering. And let's be honest, the ease of preparation is a significant bonus.

The magic of slow-cooked onions: The secret to this tart lies in the slow cooking of the onions. It takes time, yes, but the result is well worth the effort. The onions transform from sharp and pungent to mellow and sweet, developing a depth of flavor that's simply unmatched. I use a heavy skillet and parchment paper to gently coax the onions towards golden perfection. The patience pays off in a truly exceptional taste experience.

Adapting the recipe to your taste: While I've included a basic recipe, the beauty of this tart lies in its adaptability. Feel free to experiment with different cheeses, herbs, or even add a sprinkle of other spices to create your unique flavor profile. The dough is also incredibly versatile. You could, if you choose, substitute it for a classic shortcrust pastry, or a simple puff pastry, it really depends on your preference and what is on hand. If you're short on time, you can easily adapt this to your liking.

Beyond the recipe: A culinary journey: More than just a meal, this tart is a reminder to savor the simple things. To find joy in the process of cooking, in the meticulous preparation and the anticipation of the final product. The rich tapestry of flavors and the satisfying crust serve as a small taste of the rich culture of Provence. It's a recipe that reminds me of the importance of taking the time to enjoy the little things. The golden-brown crust, the sweet, slow-cooked onions—these are the details that bring pleasure to our palates and lift our spirits. And that, in itself, is a reward worth cherishing. So, gather your ingredients, find a cozy corner, and let the aroma of this delightful tart transport you to the sun-kissed fields of Provence. Bon appétit!

Step-by-step

• Stir together yeast and warm water in a small bowl and let stand until foamy, about 5 minutes. (If mixture doesn't foam, start over with new yeast.)
• Put 1 1/2 cups flour in a medium bowl, then make a well in center of flour and add yeast mixture to well. Stir together egg, 1 tablespoon oil, and 1 1/2 teaspoons salt with a fork. Add egg mixture to yeast mixture and mix with a wooden spoon or your fingertips, gradually incorporating flour, until a soft dough forms. Transfer dough to a floured surface and knead, working in additional flour (up to 1/4 cup) as necessary, until smooth and elastic, about 5 minutes. Transfer dough to an oiled bowl and turn to coat. Cover with plastic wrap and let rise in a draft-free place at warm room temperature until doubled, 1 to 1 1/2 hours.
• While dough rises, heat remaining 1/3 cup oil in a 12-inch heavy skillet over medium-high heat until it shimmers, then sauté fennel seeds until a shade darker, about 30 seconds. Stir in onions, remaining teaspoon salt, and 1/2 teaspoon pepper, then reduce heat to medium-low and cover onions directly with a round of parchment paper. Cook, stirring occasionally, until onions are very tender and golden brown, 1 to 1 1/4 hours.
• Preheat oven to 375°F with rack in middle.
• Knead dough gently on a floured surface with floured hands to deflate. Pat out dough on a large heavy baking sheet (preferably blue steel) into a 15- by 12-inch rectangle, turning up or crimping edge, then brush mustard evenly over dough, leaving a 1/2-inch border around edge. Spread onions evenly over mustard, then sprinkle evenly with cheese.
• Bake tart until crust is golden brown, 30 to 35 minutes. Cut into 2-inch squares or diamonds and serve warm or at room temperature.