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Ingredients
- 4 medium yellow onions or large shallots
- 2 tablepoons distilled white vinegar
- 2 teaspoons grainy mustard
- Pinch of sugar
- 1/2 cup canola oil
- Kosher salt
- Pepper
Preparation
Step 1
When the embers in your grill are beginning to die down, carefully tuck in the onions at the edge. Cook until charred and tender throughout, at least 3 hours, depending on the volume and heat of your embers. Let cool completely, then scoop the tender, smoky flesh out of the charred skins (you should have about 1/2 cup). Finely chop the onion flesh.
In a medium bowl, whisk the smoked onion with the vinegar, mustard and sugar. While whisking constantly, slowly drizzle in the oil until emulsified. Season with salt and pepper.
Makes 1 cup.