French Onion Sandwiches

Indulge in the rich, savory flavors of French Onion Sandwiches, a culinary twist on the classic soup that transforms into a handheld delight. This recipe pairs golden, slow-caramelized onions enhanced with a touch of balsamic vinegar and fresh thyme with creamy Gruyere cheese for an irresistible combination. Nestled on crusty French bread slathered with Dijon mustard, these sandwiches are baked until the bread is perfectly crisp and the cheese is gooey and melted. Perfect as a comforting dinner or an elevated lunch option, they bring the deep, robust taste of French onion soup to the table in just 40 minutes. Whether paired with a crisp salad or enjoyed on their own, these sandwiches will quickly become a family favorite!

Nutriscore Rating: 63/100

Prep Time:15 mins

Cook Time:40 mins

Total Time:55 mins

Servings: 4

Ingredients

• 2 tablespoons unsalted butter
• 1 tablespoon olive oil
• 4 large yellow onions
• 1 teaspoon sugar
• 1 tablespoon balsamic vinegar
• 0.25 cup beef broth
• 1 teaspoon fresh thyme leaves
• 1 loaf French bread or baguette
• 8 ounces Gruyere cheese
• 4 teaspoons Dijon mustard
• 0 to taste salt
• 0 to taste black pepper

Directions

Step 1

Peel and thinly slice the onions into half-moons.

Step 2

In a large skillet, melt the butter with the olive oil over medium heat.

Step 3

Add the sliced onions to the skillet and stir to coat them in the fat.

Step 4

Cook the onions for about 25-30 minutes, stirring occasionally, until they are deep golden brown and caramelized. Lower the heat if necessary to prevent burning.

Step 5

Sprinkle the sugar over the onions and stir. Cook for an additional 2 minutes.

Step 6

Deglaze the pan by adding the balsamic vinegar and stirring to scrape up any browned bits from the bottom of the skillet.

Step 7

Pour in the beef broth and sprinkle in the thyme leaves. Stir and cook for another 2-3 minutes, letting the liquid reduce slightly. Season with salt and black pepper to taste. Set the caramelized onion mixture aside.

Step 8

Preheat your oven to 375°F (190°C).

Step 9

Slice the French bread or baguette lengthwise and into sandwich-sized portions.

Step 10

Spread 1 teaspoon of Dijon mustard on the bottom half of each bread portion.

Step 11

Place a generous portion of the caramelized onions on top of the mustard.

Step 12

Slice the Gruyere cheese and arrange it on top of the onions.

Step 13

Place the top halves of the bread onto the sandwiches and gently press down.

Step 14

Wrap each sandwich in aluminum foil and place them on a baking sheet.

Step 15

Bake in the preheated oven for 10-12 minutes, until the cheese is fully melted and the bread is crisp.

Step 16

Carefully unwrap the sandwiches and serve immediately. Enjoy your French Onion Sandwiches!

Nutrition Facts

Serving size	(1377.8g)

Amount per serving	% Daily Value*
Calories	2679.0

Total Fat 117.7g	0%
Saturated Fat 59.8g	0%
Polyunsaturated Fat 1.3g
Cholesterol 313.1mg	0%
Sodium 6036.0mg	0%
Total Carbohydrate 294.0g	0%
Dietary Fiber 20.6g	0%
Total Sugars 38.2g
Protein 112.6g	0%

Vitamin D 0IU	0%
Calcium 2559.1mg	0%
Iron 12.2mg	0%
Potassium 1463.6mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 39.4%

Protein: 16.8%

Carbs: 43.8%