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Ingredients
- 3 tablespoons unsalted butter
- 4 tablespoons extra-virgin olive oil
- 12 red or white bulb onions, thinly sliced into rings
- 1 cup dry white wine
- 1 cup milk
- 6 cups brodo or brown chicken stock
- 3 large eggs
- 1/2 cup freshly grated parmigiano-reggiano
- Salt and freshly ground black pepper
- slices of country bread
Details
Servings 4
Preparation
Step 1
In a large heavy-bottomed pot, heat olive oil and melt the butter medium heat. Add the onions and cook slowly for 30 minutes, stirring occasionally and allowing them to develop a rich brown color. Gradually add the wine, milk, and stock, stirring gently but constantly. Increase the heat slightly, and cook for 30 minutes at a brisk simmer.
Remove soup from heat. Beat eggs in a bowl and temper with a ladle of the soup. Stir cheese and eggs into soup and season with salt and pepper. Let rest for 5 minutes.
Grill or toast bread and drizzle with olive oil. Place crostini in a bowl and ladle soup on top.
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