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, featuring caramelized onions and fresh thyme. This rustic and savory tart is perfect for a cozy dinner or an elegant gathering. The combination of sweet onions, juicy tomatoes, and aromatic herbs creates a dish that is both comforting and sophisticated.
For more summer-inspired recipes, check out this Heirloom Tomato Ricotta Tart or explore the freshness of a Classic Italian Bruschetta.
Ingredients

- 1 sheet puff pastry, thawed
- 2 large beefsteak tomatoes, sliced
- 2 large onions, thinly sliced
- 2 tbsp olive oil
- 1 tbsp fresh thyme leaves
- 1 tbsp balsamic vinegar
- 1 tsp 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 olive oil in a pan over medium heat. Add the sliced onions, sugar, and a pinch of salt. Cook, stirring occasionally, until the onions are golden brown and caramelized, about 20-25 minutes. Stir in the balsamic vinegar and cook for another 2 minutes. Set aside to cool.
2. Prepare the Puff Pastry
Roll out the puff pastry on a lightly floured surface to fit your tart pan. Transfer the pastry to the pan and trim the edges. Prick the base 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. Top with the caramelized onions, spreading them out evenly. Arrange the tomato slices on top of the onions, overlapping slightly. Sprinkle with fresh thyme leaves, salt, and pepper.
4. Bake the Tart
Brush the edges of the pastry with the beaten egg. Bake in a preheated oven at 375°F (190°C) for 25-30 minutes, or until the pastry is golden brown and crisp.
5. Serve
Allow the tart to cool slightly before slicing. Serve warm or at room temperature, garnished with additional thyme if desired.
Expert Tips
- For extra flavor, roast the tomatoes lightly before assembling the tart.
- Use a mandoline slicer for evenly sliced tomatoes and onions.
- Add a sprinkle of grated Parmesan cheese before baking for a cheesy twist.
- Pair this tart with a fresh Summer Peach Burrata Salad for a complete meal.
FAQ
Can I use a different type of tomato?
Yes, you can use heirloom tomatoes or Roma tomatoes, but beefsteak tomatoes are ideal for their juicy and meaty texture.
How do I store leftovers?
Store any leftovers in an airtight container in the refrigerator for up to 2 days. Reheat in the oven at 350°F (175°C) for 10 minutes before serving.
Can I make this tart ahead of time?
Yes, you can assemble the tart and refrigerate it for up to 4 hours before baking. This makes it a great option for entertaining.

Beefsteak Tomato Tart with Caramelized Onions and Thyme
Ingredients
Method
- Heat olive oil in a pan over medium heat. Add the sliced onions, sugar, and a pinch of salt. Cook, stirring occasionally, until the onions are golden brown and caramelized, about 20-25 minutes. Stir in the balsamic vinegar and cook for another 2 minutes. Set aside to cool.
- Roll out the puff pastry on a lightly floured surface to fit your tart pan. Transfer the pastry to the pan and trim the edges. Prick the base with a fork to prevent it from puffing up too much during baking.
- Spread a layer of ricotta cheese evenly over the puff pastry. Top with the caramelized onions, spreading them out evenly. Arrange the tomato slices on top of the onions, overlapping slightly. Sprinkle with fresh thyme leaves, salt, and pepper.
- Brush the edges of the pastry with the beaten egg. Bake in a preheated oven at 375°F (190°C) 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 thyme if desired.






