Appetizer with hard cheese and caramelized onions.

Summary

Ingredients

• Bread (ciabatta) – 12 slices, 1-2 centimeters thick
• Gruyere cheese (in the absence of Gruyere cheese, replace it with any very hard cheese) –
• 220 g
• Vegetable oil (best of all rapeseed) – 2 tbsp
• Butter – 5 tbsp
• Bulb onions (large) – 2 pcs.
• Wine vinegar – 2 teaspoon
• Sugar – 1 teaspoon

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Instructions

1. In a skillet, heat 1 tablespoon vegetable oil and 1 tablespoon butter over medium heat.
2. When the butter has melted, add the finely chopped onion. Cook, stirring constantly until the onions begin to caramelize (time – about 25 minutes).
3. Add vinegar, sugar, and 2 tablespoons of water. Stir well, lifting from the bottom anything that might settle during the cooking of onions in oil. Cook until the liquid has completely evaporated.
4. Oil 1 side of all bread slices. Place 6 slices butter side down. Top with thinly sliced ​​Gruyere cheese. Then the caramelized onions. Cover with another slice of bread (butter side up).
5. Heat a skillet over medium heat. Layout the sandwiches and cook until the cheese starts to melt and the bread begins to acquire a golden brown color (time – 2-4 minutes). Turn over and wait until the bread on the other side is golden brown.
6. Cut in half and serve immediately.

Enjoy your meal!