Petit Trois's French Onion Soup

Ingredients for Petit Trois's French Onion Soup

• 2.7kg veal neck or beef bones

• 1 tablespoon grapeseed or vegetable oil

• 2 large onions, chopped

• 6 celery stalks, chopped

• 450g carrots, peeled, chopped

• 40g tomato paste

• 1 spicchio d'aglio, tagliato a metà trasversalmente

• 4 rametti di timo

• 1 foglia di alloro

• 3 tablespoons grapeseed or vegetable oil

• 1 cucchiaio di burro non salato

• 1 spicchio d'aglio, tagliato a metà trasversalmente

• 1.8kg onions, thinly sliced

• Sale kosher, pepe macinato fresco

• 3 tablespoons dry Sherry

• 6 rametti di timo

• 1 foglia di alloro

• 4 1/2"-thick slices baguette, toasted

• 4 1/8"-thick slices Gruyere

• 4 1/8"-thick slices Emmenthal cheese

• Garza

• French onion soup bowls or 230g ramekins

Preheat oven to 218°C. Place a wire rack inside a rimmed baking sheet and place bones on top. Roast bones (undisturbed) until deep golden brown, 40–50 minutes. Transfer to a large pot and add 4.7L of water. Bring to a simmer, then use a fine-mesh sieve to skim off any foam or gray bits from the surface. Remove from heat.

Meanwhile, in another large pot, heat oil over medium-high. Add onions, celery, and carrots and cook, stirring occasionally, until vegetables start to caramelize, 10–15 minutes. Add tomato paste and cook, stirring often, until slightly darkened in colour, 6–8 minutes.

Add bones along with liquid, garlic, thyme, and bay leaf to vegetables. Bring just to a boil; reduce heat to low, and cook at a bare simmer, adding water as needed during cooking to maintain level of liquid until stock is flavorful, about 2 hours. Strain stock through a fine-mesh sieve into a large bowl, then strain again into another large bowl or airtight containers.

Stock can be made 5 days ahead. Let cool; cover and chill, or freeze up to 1 month ahead.

Heat oil and butter in a large pot over medium heat. Place garlic, cut side down, in pot and cook undisturbed until golden brown, about 4 minutes. Transfer garlic to a plate.

Add onions to same pot, season with salt and pepper, and cook, stirring occasionally at first and then more often as onions darken to keep them from getting too brown in any one spot, until golden but not mushy, 60–70 minutes (and no, this process can't be rushed at a higher temperature).

Add Sherry and stir, scraping up any browned bits from bottom of pot. Stir in 1925ml veal stock. Bundle up garlic, thyme, and bay leaf in cheesecloth and tie closed with kitchen twine. Add to pot; bring mixture to a boil. Reduce heat and cook, stirring occasionally, until liquid is reduced by one-quarter, flavours have melded, and onions are completely tender, 45–50 minutes.

Heat grill. Divide soup among bowls and top each with a toast and a slice each of Gruyere and Emmenthal cheese. Place on a rimmed baking sheet and grill until cheese is melted and brown in spots, about 5 minutes. Let cool for a minute or so before serving.

Avvertenza

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