Step 1

Set a fine-mesh strainer over a medium heatproof bowl. Thinly slice shallots crosswise into rings on a mandoline (they should be about the thickness of a dime).

Step 2

Place shallots in a medium saucepan and pour in oil to submerge. Set over medium-low heat and cook, stirring often with a fork to encourage rings to separate, until shallots are golden brown, 20–25 minutes. (Keep an eye on them; once they start to brown they’ll darken fast.)

Step 3

Pour shallots into strainer to drain, then transfer to paper towels. Season with salt and let cool. Reserve shallot oil for another use, like vinaigrettes, stir-fries, and soups.

Step 4

Do Ahead: Shallots can be fried 5 days ahead. Store airtight at room temperature.