Caramelized Onion Tart

The Caramelized Onion Tart is a savory pastry dish featuring slow-cooked, sweet onions baked in a flaky crust, often with a creamy custard or cheese filling. Originating from French cuisine, it is a popular appetizer or light meal known for its rich, deep flavors.

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🍽️ Nutrition at a glance

This dish is typically high in fat and carbohydrates due to the buttery crust, caramelized onions, and cheese, providing a good source of energy and some protein. A single serving can range from 300 to 500 calories, depending on portion size and specific ingredients.

Nutrition breakdown

Calories	380 kcal
Protein	8 g
Carbs	32 g
Fat	24 g
Fiber	2 g
Sugar	8 g
Sodium	480 mg
Potassium	180 mg
Calcium	120 mg
Iron	1.8 mg
Vitamin A	250 IU
Vitamin B1 (Thiamine)	0.2 mg
Vitamin B2 (Riboflavin)	0.15 mg
Vitamin B12	0.3 mcg
Folate	45 mcg

Per 1 slice (150 g) · estimated, varies by recipe

💡 What's interesting

The slow caramelization of onions transforms their sharp flavor into a natural sweetness, making this tart a unique blend of savory and sweet. Nutritionally, onions offer antioxidants and fiber, while the tart showcases how simple ingredients can be elevated through patient cooking techniques.