Red onion relish & vegetable tart is a delightful and savory dish that combines the sweetness of caramelized red onions with the freshness of zucchini and cherry tomatoes, all nestled in a crumbly, buttery tart crust. Enhanced with tangy feta cheese, this tart is perfect as a light lunch or a delicious appetizer. It's a wonderful way to enjoy seasonal vegetables in a simple yet flavorful preparation.
This red onion relish & vegetable tart is not only a feast for the eyes but also a treat for the taste buds. The combination of sweet, tangy, and savory flavors, along with a crispy crust, makes it a delightful dish for any occasion. Serve it warm or at room temperature, and enjoy the compliments from family and friends!
The tart should be baked in a preheated oven at 375°F (190°C) for 35-40 minutes, or until the crust is golden brown and the vegetables are tender.
Store any leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in the oven or microwave before serving.
You can substitute feta cheese with goat cheese, ricotta, or a dairy-free cheese alternative if you prefer a different flavor profile or need a dairy-free option.
The tart is done when the crust is golden brown and the vegetables are tender. You can test the doneness by inserting a knife into the filling; it should slide in easily.
A 9 to 10-inch tart pan is recommended for this recipe, as it allows the crust and filling to bake evenly.
- Pre-bake the tart crust: Blind bake the tart crust for about 10-15 minutes at 350°F (175°C) before adding the filling to ensure a crisp and well-cooked bottom.
- Caramelize the onions properly: Cook the red onions over medium-low heat, stirring occasionally, until they become soft and caramelized. This can take up to 20 minutes but adds a deep, sweet flavor to the relish.
- Choose firm and fresh vegetables: Use fresh and firm zucchini and cherry tomatoes to maintain a good texture and vibrant color in the tart.
- Season the vegetables: Don't forget to season the zucchini and onions with salt and pepper to enhance their natural flavors.
- Use cold butter for the crust: Ensure the butter is cold when making the tart crust to achieve a flaky texture. You can even chill the mixture in the refrigerator if it starts getting too warm.
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