Heirloom Tomato Tart with Basil and Gruyere Cheese

With school buses rolling and Halloween decorations on store shelves it is easy to be fooled into thinking that summer is over. Not so. We are just ⅔ of the way through with five weeks of summer heat ahead of us. In gardening terms, that means hundreds of pounds of ripe tomatoes before the first frost shifts our attention to fried green tomatoes. For me, that means finding new recipes and fresh ideas for using all those tomatoes. I don't want to waste a single home-grown tomato because, once gone, it will be midway into 2015 before we see them again. That brings me to this beauty, the Heirloom Tomato Tart with Basil and Gruyere Cheese.

You can make pie crust from scratch or take the easy way out with a prepared crust from the grocery. I chose to use a prepared crust because they are easy and we like the flavor and flakiness of our favorite, Pillsbury. Tomato, onion, and the cheese mixture are layered into the unbaked crust. You can use any fresh tomato in this tart but heirloom tomatoes make all the difference. I chose fleshy varieties with minimal seeds and gorgeous colors and patterns. My favorite is Mr. Stripey.

If you take the time to draw the water out of the tomatoes your tart will be firm and easy to slice and the crust will stay flaky, not soggy. Sweet onion and fresh herbs compliment the tomatoes perfectly. I love this Heirloom Tomato Tart with Basil and Gruyere Cheese. I ate it for lunch and dinner yesterday and again for lunch today.

Heirloom Tomato Tart with Basil and Gruyere Cheese

Cheesy tart with heirloom tomatoes, onions, and herbs.

4.77 from 17 votes

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Prep Time 10 mins

Cook Time 45 mins

Total Time 55 mins

Course

Appetizer

,

Lunch

Servings 6

Equipment

• Tart pan 9"
• Paper towels
• Small bowl
• Baking sheet

Ingredients

  

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• 1 Unbaked single pie crust
• 2 ½ pounds assorted heirloom tomatoes
• 2 teaspoon salt
• 1 cup chopped sweet onion
• 1 ¾ cups grated Gruyere cheese
• ½ cup grated Parmesan cheese
• ¾ cup mayonnaise
• ⅓ cup basil chopped
• 1 tablespoon chopped fresh thyme
• ¼ teaspoon pepper
• 1 egg lightly beaten

Instructions

 

For the crust:

• Place the crust in a 9-inch fluted tart pan with 2-inch sides and a removable bottom. Press dough into pan. Trim excess dough along edges.
• Refrigerate for 30 minutes while preparing the filling.

For the filling:

• Slice tomatoes into ¼ inch slices and remove seeds if desired. Let sit for 30 minutes.
• Lay slices on triple thickness paper towels and sprinkle with one teaspoon of salt.
• Flip and let them drain from the other side for at least 15 minutes.
• In a small bowl combine the Gruyere and Parmesan cheeses, mayonnaise, basil, thyme, ½ teaspoon salt, freshly ground black pepper, and one lightly beaten egg.

To assemble pie:

• Preheat oven to 425 degrees. Pat tomato slices with paper towel to remove excess moisture. Add minced onion to bottom of pie crust.
• Top onion with ⅓ of the cheese mixture. Layer ⅓ of the tomatoes over cheese mixture. Top tomatoes with ⅓ of cheese mixture.
• Repeat with another layer of tomatoes and cheese mixture. Arrange the last tomatoes on top of pie in an overlapping pattern.
• Place pie on baking sheet and place in oven. Bake for 40 to 45 minutes.
• Cool completely before cutting. Serve at room temperature.

Nutrition

Calories: 572kcalCarbohydrates: 25gProtein: 20gFat: 44gSaturated Fat: 15gPolyunsaturated Fat: 14gMonounsaturated Fat: 13gTrans Fat: 1gCholesterol: 89mgSodium: 1347mgPotassium: 584mgFiber: 4gSugar: 7gVitamin A: 2196IUVitamin C: 30mgCalcium: 526mgIron: 2mg

Approximate nutrition information is provided as a convenience and courtesy only. You are encouraged to do your own calculations if precise data is required.

We take every effort to ensure that the estimated meal cost per serving is accurate. We use a meal cost analysis application that estimates the cost of a recipe based on groceries purchased at a Walmart store in my geographical area, northern California.

Tried this recipe?Let us know how it was!

You might also like my Green Tomato Tart.