Easy Potato and Onion Tart Recipe: Perfect for Any Occasion

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Written By Haryana’s Restaurant

Authentic Indian Food – Classic Indian Cuisine in Terrace BC

Imagine biting into a warm slice of potato and onion tart, where the buttery crust meets the sweet caramelized onions and tender, savory slices of potato. It’s a dish that brings together simplicity and elegance in every bite. This classic tart, rooted in the rustic kitchens of France, has found its way onto dining tables around the world, loved for its versatility and comforting flavors.

Whether you’re hosting a cozy dinner party or looking for a delightful addition to your brunch menu, this tart is sure to impress. It’s surprisingly easy to make, and you can even customize it with your favorite herbs or a sprinkle of cheese for an extra touch of indulgence. Let’s dive into how you can create this delightful dish that’s bound to become a favorite in your culinary repertoire.


Gather your ingredients to create a delectable potato and onion tart that’s perfect for any gathering. Follow this list to ensure your tart is as flavorful as it is inviting.

  • 1 1/4 cups all-purpose flour
  • 1/2 teaspoon salt
  • 1/2 cup (1 stick) unsalted butter, chilled and diced
  • 4-5 tablespoons ice water
  • 2 tablespoons olive oil
  • 3 large onions, thinly sliced
  • 2 cloves garlic, minced
  • 1 teaspoon fresh thyme leaves, chopped
  • 1/4 teaspoon salt
  • 1/4 teaspoon black pepper
  • 2 large potatoes, peeled and thinly sliced
  • 1 cup heavy cream
  • 2 eggs
  • 1 cup grated Gruyère cheese (optional but recommended for a richer taste)

Equipment Needed

To craft your potato and onion tart, you’ll need some essential kitchen tools that will help ensure its preparation goes smoothly and yields delicious results. Gather the following items before you start:

  • Rolling Pin: Employ this tool to evenly roll out your tart dough to the desired thickness.
  • 9-inch Tart Pan: A pan with a removable bottom is ideal for easy removal of the tart once it’s baked.
  • Parchment Paper: Useful for lining the tart pan, which aids in the even cooking of the crust and simplifies cleanup.
  • Mixing Bowls: Have a set of mixing bowls in various sizes ready for mixing the crust, the filling, and the cheese mixture.
  • Whisk: This will be necessary for thoroughly combining the eggs and cream for a smooth, lump-free mixture.
  • Measuring Cups and Spoons: Accurate measuring tools are critical for ensuring each ingredient is used in the correct amount.
  • Knife and Cutting Board: A sharp knife and sturdy cutting board are required for chopping onions and slicing potatoes finely.
  • Large Skillet: Needed for sautéing the onions and garlic to achieve that perfect caramelization.
  • Oven: Preheat your oven according to the recipe directions to ensure your tart cooks evenly.
  • Frying Pan: If you’re adding any pre-cooked elements like bacon or mushrooms, this will be necessary.

Gathering these tools in advance will set you up for success and make the process of creating your tart an enjoyable and stress-free cooking experience.

Prep Work

Now that you have all your essential tools ready, let’s start by prepping the base ingredients for your tart.

Preparing the Vegetables

Begin by washing your potatoes and onions under cold water to remove any dirt. Next, peel the onions and slice them thinly. For the potatoes, peel them and cut into thin slices, about 1/8-inch thick. This ensures they cook evenly and integrate perfectly with the layers of onions. If you have a mandoline slicer, use it to achieve consistent thickness.

To enhance the flavor, soak the potato slices in cold water for about 5 minutes to remove excess starch. Drain well and pat dry with a kitchen towel. This step will help your potatoes become beautifully crisp as they bake. Set the sliced onions and potatoes aside.

Preparing the Tart Base

Move on to the tart base. On a clean, flat surface, unfold your store-bought puff pastry, or if you’ve made your crust from scratch, roll it out into a circle that’s about 1/4-inch thick. Carefully lay the pastry in your tart pan, pressing it into the edges and trimming any excess dough hanging over the sides. Using a fork, gently prick the base of the dough all over; this prevents it from puffing up too much during baking.

To give your tart an extra barrier against the moisture from the onions and potatoes, brush the surface of the dough lightly with a beaten egg. This creates a seal that helps keep the crust crispy. Chill the prepared base in the refrigerator while you get on with caramelizing the onions and prepping the other fillings, making your assembly process smoother and more efficient.


Now that you’ve prepared your ingredients and tart base, it’s time to assemble and bake your potato and onion tart. Follow these steps to ensure a delicious result.

Assembling the Tart

  1. Preheat your oven to 375°F (190°C). This ensures your tart cooks evenly.
  2. Arrange the onions on the chilled tart base. Spread the caramelized onions evenly across the bottom of the pastry to create a flavorful foundation.
  3. Layer the potatoes over the onions. Arrange the soaked and drained potato slices in a single layer, slightly overlapping them for a neat presentation.
  4. Season generously. Sprinkle salt, pepper, and your choice of herbs (like thyme or rosemary) over the potatoes. This will infuse the tart with delightful aromas and enhance its flavors.
  5. Add cheese if desired. For an extra touch of richness, scatter grated cheese (such as Gruyère or cheddar) over the top of the potatoes.
  6. Brush the edges with the remaining beaten egg. This will give the pastry a beautiful golden color as it bakes.

Baking the Potato and Onion Tart

  1. Place the tart in the preheated oven. Set it on the middle rack to promote even cooking.
  2. Bake for 45-50 minutes. The tart should be golden brown and the potatoes should be tender when pierced with a fork.
  3. Check halfway through baking. Rotate the tart 180 degrees to ensure it browns evenly. If the edges brown too quickly, cover them with foil to prevent burning.
  4. Let it cool slightly before serving. This allows the tart to set, making it easier to slice.
  5. Serve warm. Enjoy your potato and onion tart as a delightful meal or a superb appetizer.

Serving Suggestions

After you’ve pulled your golden brown potato and onion tart from the oven, the next exciting step is serving it. This dish is incredibly versatile, making it a perfect addition to many meal types, whether you’re hosting a brunch, lunch, or a light dinner. Here’s how you can best serve and enjoy your tart:

As a Standalone Meal

Your potato and onion tart is hearty enough to serve as a complete meal. Pair it with a crisp, green salad dressed lightly with vinaigrette to add a fresh, crunchy contrast to the creamy potatoes and sweet onions. The tanginess of the vinaigrette beautifully balances the buttery richness of the tart.

At a Brunch

Slice the tart into smaller pieces and serve as a sophisticated addition to a brunch spread. Complement it with other brunch staples such as scrambled eggs, fruit salads, or mimosas. The savory flavors of the tart will blend seamlessly with both sweet and savory brunch elements.

With a Soup

For a cozy lunch or dinner, serve a warm slice of potato and onion tart alongside a bowl of your favorite soup. A smooth, creamy tomato soup or a rich vegetable broth makes excellent companions, turning your meal into a comforting indulgence during colder months.

As an Appetizer

If you’re entertaining, consider cutting the tart into bite-sized pieces to serve as appetizers. These can be topped with a dollop of sour cream and a sprinkle of chives to enhance the flavors and make them easy to manage at a party setting.

Following these serving suggestions, you can easily integrate this delicious tart into any meal plan. Its flexibility and crowd-pleasing qualities will surely make it a beloved option for any gathering or quiet night in.

Make-Ahead Tips

Preparing the Crust in Advance

You can create the crust for your potato and onion tart up to two days before you plan to bake it. Simply prepare the dough, roll it out, and fit it into your tart pan. Wrap it tightly in plastic wrap and store it in the refrigerator. When you’re ready to assemble your tart, the crust will be chilled and ready to fill.

Caramelizing Onions Ahead of Time

Caramelized onions take some time to prepare, but did you know you can make them ahead? Cook your onions until they’re beautifully golden and sweet, then let them cool. Store them in an airtprint container in the fridge for up to three days. This not only saves time but also enhances their flavor, making your tart even more delicious.

Pre-Cooking the Potatoes

To ensure even cooking and save time on the day of baking, boil or steam your potato slices until they are just tender. Allow them to cool, then cover and refrigerate them. They’ll be perfectly prepped for layering into your tart, ensuring each bite is tender and satisfying.

Assembling the Tart the Day Before

Assemble your tart, minus the final egg or cream topping, the day before you need it. Keep the assembled tart in the refrigerator, covered lightly with foil or plastic wrap. The next day, simply add the final touches and bake. This method allows the flavors to meld beautifully overnight, creating an even more flavorful dish.

Following these make-ahead tips, you’ll streamline the process of preparing your potato and onion tart, making it a stress-free delight whether for a weeknight dinner or a special occasion gathering.


Now that you’ve got all the tips and tricks up your sleeve for making a delightful potato and onion tart you’re well on your way to impressing at your next meal. Whether it’s a cozy dinner for two or a larger gathering this tart promises to be a hit. Don’t forget you can always tweak the recipe to suit your taste or what you have on hand. So roll up your sleeves preheat your oven and get ready to enjoy the wonderful aromas and delicious tastes that only a homemade tart can offer. Happy cooking!

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