Easy Keto Tomato Tart (Gluten-Free & Low-Carb)

Snacks

March 29, 2026

Imagine biting into a slice of pure summer. That’s exactly what you get with this stunning Keto Heirloom Tomato Tart. A crisp, buttery, gluten-free crust provides the perfect base for sun-ripened heirloom tomatoes bursting with flavor, all nestled under a blanket of perfectly melted cheese. This isn’t just a recipe; it’s an elegant, yet incredibly simple, way to celebrate fresh ingredients. Whether you’re serving it as a light lunch, a sophisticated appetizer, or just treating yourself, this tart proves that low-carb eating can be absolutely divine.

Ingredients

• For the Gluten-Free Coconut Flour Crust
• 2 large eggs
• ¾ cup / 90g coconut flour
• ½ cup / 120ml coconut oil, melted
• ½ tsp salt
• For the Savory Tomato & Cheese Filling
• 4 oz / 113g heirloom tomatoes, about 1-2 medium
• 3 oz / 85g cheese, shredded mozzarella or crumbled goat cheese
• Salt and freshly ground black pepper, to taste
• Optional: 1 tsp dried oregano or fresh basil

Instructions

1. Preheat oven to 350°F / 175°C. Prepare a 9-inch tart pan with a removable bottom.
2. In a medium bowl, whisk the eggs. Stir in the coconut flour, melted coconut oil, and salt until a thick, uniform dough forms.
3. Press the dough firmly and evenly into the bottom and up the sides of the prepared tart pan.
4. Blind bake the crust for 15-20 minutes, until the edges are lightly golden and the center is set.
5. While the crust bakes, slice the heirloom tomatoes into ¼-inch thick rounds. Pat them dry with a paper towel to remove excess moisture.
6. Remove the crust from the oven. Sprinkle the cheese evenly over the bottom of the warm crust.
7. Arrange the tomato slices over the cheese in a single, slightly overlapping layer.
8. Season with salt, pepper, and optional oregano. Return to the oven and bake for an additional 20 minutes, until the cheese is bubbly and tomatoes are fragrant.
9. Let the tart cool in the pan for at least 10 minutes before removing the outer ring to allow it to set for clean slicing. Serve warm or at room temperature.

Nutritional Information

• Estimated values for 1 of 8 slices
• Calories: 215 kcal
• Net Carbohydrates: 3g
• Protein: 6g
• Fat: 18g

Pro Tips

• Patting tomatoes dry is crucial to prevent a soggy crust. Use a paper towel to absorb as much moisture as possible before arranging them.
• Coconut flour crusts can brown very quickly. Check the crust at the 12-minute mark during the blind bake to prevent over-browning.
• For a savory garlic flavor, add ¼ teaspoon of garlic powder directly to the crust dough before pressing it into the pan.
• Let the tart rest for at least 10 minutes after baking. This allows the filling to set, ensuring clean, beautiful slices.

FAQ

Q: How do I prevent a soggy tart crust
A: The most important step is to pat the sliced tomatoes dry with a paper towel to remove as much excess moisture as possible before baking. Blind baking the crust first also creates a barrier that helps keep it crisp.

Q: Can I use a different flour for the crust
A: This crust recipe is specifically formulated for coconut flour, which is very absorbent. Substituting another flour like almond flour would require changing the egg and oil ratios and is not recommended for this specific recipe.

Q: Can I make this keto tomato tart ahead of time
A: Yes, this tart is delicious served warm or at room temperature. You can bake it a day ahead, store it covered in the refrigerator, and let it come to room temperature or gently reheat it in a low oven before serving.

Q: What other cheeses can I use in this tart
A: While mozzarella and goat cheese are excellent choices, you could also use crumbled feta, grated Parmesan, provolone, or a savory Italian blend. Choose a cheese that melts well and complements the fresh tomato flavor.

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