Sweet And Sour Cipollini Onions - cooking recipe

Ingredients

2 pounds cipollini onions, peeled
3 tablespoons unsalted butter
1 1/2 teaspoons salt
1/2 cup balsamic vinegar
2 tablespoons white sugar, or to taste

Preparation

Bring a large pot of water to a boil. Add onions and simmer until tender, about 20 minutes. Drain and pat dry.
Melt butter in a large skillet over medium-high heat. Add onions and stir until well coated with butter. Season with salt. Cook and stir until onions are brown and caramelized, about 5 minutes. Pour in vinegar and sprinkle with sugar. Continue cooking and stirring until vinegar comes to a boil. Boil until vinegar thickens and glazes onions, about 5 minutes. Serve hot or cooled with vinegar syrup drizzled on top.