Open-faced Onion Sandwich
An open-faced onion sandwich is a simple, rustic dish featuring caramelized or raw onions served atop a single slice of bread, often with butter, mustard, or cheese. It's a classic comfort food found in various forms across Europe and North America, prized for its straightforward preparation and savory flavor.
🍽️ Nutrition at a glance
This dish is typically high in carbohydrates from the bread and can be moderate in fat depending on the amount of butter or cheese used. It provides some fiber and vitamins from the onions, with a rough calorie ballpark of 200-350 per serving.
Nutrition breakdown
| Calories | 280 kcal |
| Protein | 8 g |
| Carbs | 32 g |
| Fat | 14 g |
| Fiber | 3 g |
| Sugar | 5 g |
| Sodium | 480 mg |
| Potassium | 150 mg |
| Vitamin C | 8 mg |
| Calcium | 120 mg |
| Iron | 2 mg |
| Vitamin B6 | 0.2 mg |
| Folate | 40 mcg |
| Magnesium | 25 mg |
| Phosphorus | 100 mg |
Per 1 sandwich (approx. 150 g) · estimated, varies by recipe
💡 What's interesting
Nutritionally, onions are a good source of antioxidants and may support immune health, making this simple sandwich a surprisingly nutritious option. Culturally, it's often associated with humble, home-style cooking and has been a staple in times of frugality or as a quick, satisfying snack.
