Savory Roast Onion Tart Recipe

Savory Roast Onion Tart Recipe made with Truvia

This Roast Onion Tart recipe has 3% fewer calories* and 50% less sugar* than the full-sugar version of this recipe. Makes one 9-inch tart (8 servings). To watch a video demonstration of how to make this recipe, click here.

Serving size: 1 slice

Calories: 300 Calories


  • 34 cup roasted, unsalted nuts

  • 34 cup whole wheat flour

  • 3 tsp of zero-calorie Truvia Original Calorie-Free Sweetener Spoonable Jar***

  • 12 tsp kosher salt

  • 6 Tbsp cold unsalted butter, cut into 12-inch cubes

  • 2 egg whites

  • 2 Spanish or Vidalia onions, peeled and cut into wedges

  • 1 red onion, peeled and cut into wedges

  • 2 Tbsp balsamic vinegar

  • 1 tsp olive oil

  • 1 cup fat-free ricotta

  • 2 eggs, beaten

  • 14 tsp kosher salt

  • 14 tsp black pepper

  • 1 Tbsp fresh thyme


  • 1.

    Preheat oven to 400° F.

  • 2.

    In a food processor, pulse nuts until coarsely chopped. Add flour, Truvía Original Sweetener and salt and pulse to combine. Add butter and pulse until the mixture resembles a coarse meal. Add egg whites and pulse just until dough comes together and forms a ball. Add a tablespoon of ice water if mixture needs more liquid to come together. Press dough with wet hands into a 9-inch tart pan with removable bottom into an even layer and up the sides. Refrigerate for 1 hour.

  • 3.

    On a sheet pan, combine onions, balsamic, oil and 134 tsp Truvía Original Sweetener (or 2 packets) and toss to coat. Roast for 20 minutes, turning onions over halfway.

  • 4.

    In a small bowl combine ricotta, egg, salt, pepper and 34 tsp Truvía Original Sweetener (or 1 packet) and stir. Evenly spread filling on bottom of the tart shell. Carefully arrange roasted onions in a rosette pattern, saving the smaller pieces for the middle. Sprinkle with thyme and bake for 20–25 minutes or until crust is golden and filling is set.

  • 5.

    Let cool 10 minutes before cutting into wedges.

*This tart has 290 calories and 4 grams of sugar per serving compared to the full-sugar version which has 300 calories and 8 grams of sugar per serving.

**Erythritol value may vary based on your choice of sweetener

Nutrition Per Serving

Calories 300
Calories from Fat 170
Total Fat 19g
Saturated Fat 8g
Trans Fat 0g
Cholesterol 60mg
Sodium 210mg
Total Carbohydrate 27g
Dietary Fiber 4g
Sugars 8g
Erythritol** 2g
Protein 10g
Vitamin A 10% DV
Calcium 10% DV
Vitamin C 15% DV
Iron 8% DV
Savory Roast Onion Tart is rated 5.0 out of 5 by 3.
Rated 5 out of 5 by from Savory and FANTASTIC with Truvia! I tried this last week-and it is AMAZING! Since switching to Truvia I use it in all of my recipes-including my baking! Its flawless-Like this tart!
Date published: 2016-02-19
Rated 5 out of 5 by from Easy to make. This is a fabulous recipe. Looks great and tastes DIVINE. A real hit at my party.
Date published: 2015-09-16
Rated 5 out of 5 by from OMG LOVE IT ! Never in a million years did I think I would like - much less love - this dish! My mom would be amazed that I actually like something with onion in the title. But I made it for my partner and the young adults in the house and they all loved it. I finally gave in and took a taste and I now have a new favorite favorite food. The Truvia gives it just the right amount of 'sweet' to make the dish work. Try it - you will be amazed!
Date published: 2015-02-04
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