Beefsteak Tomato Tart with Caramelized Onions and Thyme
Beefsteak Tomato Tart with Caramelized Onions and Thyme

Indulge in the rich flavors of summer with this Beefsteak Tomato Tart. The combination of juicy beefsteak tomatoes, sweet caramelized onions, and aromatic thyme creates a rustic yet elegant dish that is perfect for any occasion. Whether you’re hosting a dinner party or simply craving a comforting savory tart, this recipe is sure to impress.

Ingredients
- 1 sheet puff pastry, thawed
- 2 large beefsteak tomatoes, sliced
- 2 large onions, thinly sliced
- 2 tablespoons olive oil
- 1 tablespoon butter
- 1 tablespoon fresh thyme leaves
- 1 teaspoon sugar
- Salt and pepper to taste
- 1 cup ricotta cheese
- 1 egg, beaten (for egg wash)
Step-by-Step Instructions
1. Caramelize the Onions
Heat the olive oil and butter in a large skillet over medium heat. Add the thinly sliced onions and cook, stirring occasionally, until they begin to soften. Sprinkle with sugar and a pinch of salt, then reduce the heat to low. Continue cooking, stirring occasionally, until the onions are golden brown and caramelized. This process can take up to 30 minutes. Stir in the fresh thyme leaves and set aside.
2. Prepare the Puff Pastry
Preheat your oven to 375°F (190°C). Roll out the thawed puff pastry on a lightly floured surface to fit your tart pan. Transfer the pastry to the pan and trim any excess edges. Prick the base of the pastry with a fork to prevent it from puffing up too much during baking.
3. Assemble the Tart
Spread a layer of ricotta cheese evenly over the puff pastry base. Arrange the sliced beefsteak tomatoes on top of the ricotta, slightly overlapping them. Spoon the caramelized onions over the tomatoes, ensuring they are evenly distributed.
4. Bake the Tart
Brush the edges of the puff pastry with the beaten egg to create a golden finish. Bake in the preheated oven for 25-30 minutes, or until the pastry is golden brown and crisp.
5. Serve and Enjoy
Allow the tart to cool slightly before slicing. Serve warm or at room temperature, garnished with additional fresh thyme leaves if desired.
Expert Tips
- Choose Ripe Tomatoes: For the best flavor, select beefsteak tomatoes that are ripe but still firm. This ensures they hold their shape during baking.
- Even Slicing: Slice the tomatoes evenly to ensure they cook uniformly and create an attractive presentation.
- Prevent Soggy Pastry: To avoid a soggy crust, pat the tomato slices dry with a paper towel before placing them on the tart.
- Customize with Herbs: Feel free to experiment with other herbs like rosemary or basil for a different flavor profile.
FAQ
Can I make this tart ahead of time?
Yes, you can prepare the tart a few hours ahead of time and store it in the refrigerator. Reheat it in the oven at 350°F (175°C) for about 10 minutes before serving.
What can I serve with this tart?
This tart pairs beautifully with a light salad, such as a Fresh Summer Tomato Peach Salad or a Grilled Peach Burrata Salad. It also makes a great addition to a brunch spread.
Can I use a different type of tomato?
While beefsteak tomatoes are ideal for their size and flavor, you can also use heirloom tomatoes or large vine-ripened tomatoes. Just ensure they are sliced evenly for the best results.
For more savory tart inspiration, check out this Easy Tomato Puff Pastry Tart recipe. It’s another delightful option for tomato lovers!

Beefsteak Tomato Tart with Caramelized Onions and Thyme
Ingredients
Method
- Heat the olive oil and butter in a large skillet over medium heat. Add the thinly sliced onions and cook, stirring occasionally, until they begin to soften. Sprinkle with sugar and a pinch of salt, then reduce the heat to low. Continue cooking, stirring occasionally, until the onions are golden brown and caramelized. This process can take up to 30 minutes. Stir in the fresh thyme leaves and set aside.
- Preheat your oven to 375°F (190°C). Roll out the thawed puff pastry on a lightly floured surface to fit your tart pan. Transfer the pastry to the pan and trim any excess edges. Prick the base of the pastry with a fork to prevent it from puffing up too much during baking.
- Spread a layer of ricotta cheese evenly over the puff pastry base. Arrange the sliced beefsteak tomatoes on top of the ricotta, slightly overlapping them. Spoon the caramelized onions over the tomatoes, ensuring they are evenly distributed.
- Brush the edges of the puff pastry with the beaten egg to create a golden finish. Bake in the preheated oven for 25-30 minutes, or until the pastry is golden brown and crisp.
- Allow the tart to cool slightly before slicing. Serve warm or at room temperature, garnished with additional fresh thyme leaves if desired.






