French Onion Recipe
Make French Onion Recipe in just 1h 10m. Get the full recipe with step-by-step instructions at pekinthechef.com.
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Ingredients
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Onion topping
Toasts & garnish
Method
Onion topping
- 1
Prepare onions
Peel and halve the onions from root to tip, then slice each half into thin, even half-moon slices (about 3–4 mm thick). Uniform slices ensure even caramelization.
- 2
- 3
Season and sweat
Sprinkle 1 teaspoon kosher salt and 1 tablespoon granulated sugar over the onions. Add the thyme sprigs and the bay leaf. Reduce heat to medium-low. Cook, stirring every 3–5 minutes, allowing the onions to soften and release their moisture. If they begin to stick excessively, reduce the heat slightly and stir more frequently.
- 4
Caramelize slowly
Continue to cook the onions for 35–45 minutes, stirring more often as they darken. The goal is deep golden-brown, jam-like onions. Scrape the pan bottom to incorporate browned bits; if the pan becomes dry and the onions threaten to burn before they brown, add a tablespoon of water to deglaze and continue. Remove and discard thyme sprigs and the bay leaf toward the end of this stage if they have released their flavor.
- 5
Deglaze and simmer
Increase heat to medium and add 30 ml dry red wine or cognac to deglaze the pan, scraping up all browned bits. Let the alcohol reduce for 1–2 minutes. Add 240 ml beef (or vegetable) stock and bring to a gentle simmer. Reduce the mixture until most liquid has evaporated and the onions reach a thick, glossy consistency (about 8–10 minutes).
- 6
Finish the topping
Stir in 1 tablespoon balsamic vinegar, 30 g grated Parmesan, and 1/2 teaspoon freshly ground black pepper. Taste and adjust seasoning with a little more salt if needed. Remove from heat and set aside. The onion mixture should be spreadable and not watery.
Toasts & assembly
- 7
Prepare and toast bread
Preheat your broiler (grill) to high. Arrange the 12 baguette slices on a baking sheet. Brush each slice lightly with olive oil (about 2 tablespoons total across the slices). Toast under the broiler 1–2 minutes per side, watching closely, until golden and crisp. Alternatively, grill or pan-toast the slices until crisp.
- 8
Rub with garlic
When the toasts are hot, immediately rub the top side of each slice with the cut side of 1 garlic clove to impart a gentle garlic aroma.
- 9
Assemble bruschetta
Spoon about 1 to 1 1/2 tablespoons of the warm French onion mixture onto each toast, spreading it slightly but leaving the edges crisp. Top each portion with a generous sprinkle of grated Gruyère (about 12–15 g per slice).
- 10
Melt the cheese
Place the topped toasts back under the broiler for 1–3 minutes, just until the Gruyère melts and becomes bubbly and lightly browned. Watch carefully to avoid burning.
- 11
Finish and serve
Remove from the oven, sprinkle each bruschetta with a little finely grated Parmesan and a pinch of chopped fresh parsley. Serve immediately while hot and cheesy. This recipe yields 12 bruschetta; serve 2 pieces per person for 6 servings.
